| Problem Name | Online Judge | Year | Contest | Difficulty Level | |
|---|---|---|---|---|---|
| 1 | Wine trading in Gergovia | SPOJ | 1 | ||
| 2 | All in All | UVA | 1 | ||
| 3 | Help the soldier | SPOJ | 1 | ||
| 4 | Little Elephant and Bits | Codeforces | Codeforces Round #157 (Div. 1) & Codeforces Round #157 (Div. 2) | 1 | |
| 5 | Team | Codeforces | Codeforces Round #143 (Div. 2) | 1 | |
| 6 | Dragons | Codeforces | Codeforces Round #142 (Div. 2) | 1 | |
| 7 | Twins | Codeforces | Codeforces Round #111 (Div. 2) | 1 | |
| 8 | Taxi | Codeforces | VK Cup 2012 Qualification Round 1 | 1 | |
| 9 | Chat room | Codeforces | Codeforces Beta Round #54 (Div. 2) | 1 | |
| 10 | Domino piling | Codeforces | Codeforces Beta Round #47 | 1 | |
| 11 | Sale | Codeforces | Codeforces Beta Round #34 (Div. 2) | 1 | |
| 12 | Shortest path of the king | Codeforces | Codeforces Beta Round #3 | 1 | |
| 13 | Theatre Square | Codeforces | Codeforces Beta Round #1 | 1 | |
| 14 | Adding Reversed Numbers | SPOJ | 1 | ||
| 15 | Army | Codeforces | School Personal Contest #1 (Winter Computer School 2010/11) - Codeforces Beta Round #38 (ACM-ICPC Rules) | 1 | |
| 16 | Before an Exam | Codeforces | Codeforces Beta Round #4 (Div. 2 Only) | 1 | |
| 17 | Maximum Sum (II) | UVA | 1 | ||
| 18 | Dragon of Loowater | UVA | 1 | ||
| 19 | Shopaholic | UVA | 1 | ||
| 20 | The Bus Driver Problem | UVA | 1 | ||
| 21 | Chocolate | SPOJ | 1 | ||
| 22 | I AM VERY BUSY | SPOJ | 1 | ||
| 23 | DIE HARD | SPOJ | 1 | ||
| 24 | Optimal Array Multiplication Sequence | UVA | 1 | ||
| 25 | Bon Appetit | CodeChef | 1 | ||
| 26 | Tanya and Toys | Codeforces | Codeforces Round #346 (Div. 2) | 1 | |
| 27 | Beautiful Paintings | Codeforces | Codeforces Round #345 (Div. 2) | 1 | |
| 28 | Joysticks | Codeforces | Codeforces Round #345 (Div. 2) | 1 | |
| 29 | USB Flash Drives | Codeforces | Educational Codeforces Round 3 | 1 | |
| 30 | Wilbur and Array | Codeforces | Codeforces Round #331 (Div. 2) | 1 | |
| 31 | Duff and Meat | Codeforces | Codeforces Round #326 (Div. 2) | 1 | |
| 32 | Simple Game | Codeforces | Codeforces Round #316 (Div. 2) | 1 | |
| 33 | Ilya and Diplomas | Codeforces | Codeforces Round #311 (Div. 2) | 1 | |
| 34 | Case of the Zeros and Ones | Codeforces | Codeforces Round #310 (Div. 2) | 1 | |
| 35 | Soldier and Badges | Codeforces | Codeforces Round #304 (Div. 2) | 1 | |
| 36 | Queue | Codeforces | Codeforces Round #303 (Div. 2) | 1 | |
| 37 | Woodcutters | Codeforces | Codeforces Round #303 (Div. 2) | 1 | |
| 38 | Equidistant String | Codeforces | Codeforces Round #303 (Div. 2) | 1 | |
| 39 | Quasi Binary | Codeforces | Codeforces Round #300 | 1 | |
| 40 | Vitaliy and Pie | Codeforces | Codeforces Round #297 (Div. 2) | 1 | |
| 41 | Two Buttons | Codeforces | Codeforces Round #295 (Div. 2) | 1 | |
| 42 | A and B and Team Training | Codeforces | Codeforces Round #294 (Div. 2) | 1 | |
| 43 | Drazil and Factorial | Codeforces | Codeforces Round #292 (Div. 2) & Codeforces Round #292 (Div. 1) | 1 | |
| 44 | Chewba?ca and Number | Codeforces | Codeforces Round #291 (Div. 2) | 1 | |
| 45 | Anton and currency you all know | Codeforces | Codeforces Round #288 (Div. 2) | 1 | |
| 46 | Amr and Music | Codeforces | Codeforces Round #287 (Div. 2) | 1 | |
| 47 | Team Olympiad | Codeforces | Codeforces Round #279 (Div. 2) | 1 | |
| 48 | Given Length and Sum of Digits... | Codeforces | Codeforces Round #277.5 (Div. 2) | 1 | |
| 49 | BerSU Ball | Codeforces | Codeforces Round #277.5 (Div. 2) | 1 | |
| 50 | OR in Matrix | Codeforces | Codeforces Round #277 (Div. 2) | 1 | |
| 51 | Diverse Permutation | Codeforces | Codeforces Round #275 (Div. 1) & Codeforces Round #275 (Div. 2) | 1 | |
| 52 | Exams | Codeforces | Codeforces Round #274 (Div. 2) & Codeforces Round #274 (Div. 1) | 1 | |
| 53 | Table Decorations | Codeforces | Codeforces Round #273 (Div. 2) | 1 | |
| 54 | Random Teams | Codeforces | Codeforces Round #273 (Div. 2) | 1 | |
| 55 | I Wanna Be the Guy | Codeforces | Codeforces Round #268 (Div. 2) | 1 | |
| 56 | Appleman and Toastman | Codeforces | Codeforces Round #263 (Div. 1) & Codeforces Round #263 (Div. 2) | 1 | |
| 57 | DZY Loves Strings | Codeforces | Codeforces Round #255 (Div. 2) | 1 | |
| 58 | Devu, the Singer and Churu, the Joker | Codeforces | Codeforces Round #251 (Div. 2) | 1 | |
| 59 | Choosing Teams | Codeforces | Codeforces Round #246 (Div. 2) | 1 | |
| 60 | Gravity Flip | Codeforces | Codeforces Round #238 (Div. 2) | 1 | |
| 61 | Team | Codeforces | Codeforces Round #235 (Div. 2) | 1 | |
| 62 | Fox and Number Game | Codeforces | Codeforces Round #228 (Div. 2) | 1 | |
| 63 | Bear and Raspberry | Codeforces | Codeforces Round #226 (Div. 2) | 1 | |
| 64 | Sereja and Dima | Codeforces | Codeforces Round #223 (Div. 2) | 1 | |
| 65 | TL | Codeforces | Codeforces Round #203 (Div. 2) | 1 | |
| 66 | Cinema Line | Codeforces | Codeforces Round #202 (Div. 2) | 1 | |
| 67 | Helpful Maths | Codeforces | Codeforces Round #197 (Div. 2) | 1 | |
| 68 | Puzzles | Codeforces | Codeforces Round #196 (Div. 2) | 1 | |
| 69 | Magic Numbers | Codeforces | Codeforces Round #189 (Div. 2) | 1 | |
| 70 | Building Permutation | Codeforces | Codeforces Round #175 (Div. 2) | 1 | |
| 71 | Slightly Decreasing Permutations | Codeforces | Codeforces Round #175 (Div. 2) | 1 | |
| 72 | Little Girl and Game | Codeforces | Codeforces Round #169 (Div. 2) | 1 | |
| 73 | Roadside Trees (Simplified Edition) | Codeforces | Codeforces Round #162 (Div. 2) | 1 | |
| 74 | Business trip | Codeforces | Codeforces Round #106 (Div. 2) | 1 | |
| 75 | At most twice | Live Archive | 2015 | Latin America | 1 |
| 76 | Expedition | SPOJ | 1 | ||
| 77 | Bachgold Problem | Codeforces | Codeforces Round #388 (Div. 2) | 1 | |
| 78 | Mahmoud and a Triangle | Codeforces | Codeforces Round #396 (Div. 2) | 1 | |
| 79 | Anton and Classes | Codeforces | Codeforces Round #404 (Div. 2) | 1 | |
| 80 | Vladik and flights | Codeforces | Codeforces Round #384 (Div. 2) | 1 | |
| 81 | Patrick and Shopping | Codeforces | Codeforces Round #332 (Div. 2) | 1 | |
| 82 | The number of positions | Codeforces | Codeforces Beta Round #92 (Div. 2 Only) | 1 | |
| 83 | The Stern-Brocot Number System | UVA | 1 | ||
| 84 | Train TimeTable | SPOJ | 2 | ||
| 85 | Station Balance | UVA | 2 | ||
| 86 | Ambitious Manager | SPOJ | 2 | ||
| 87 | Boys and Girls | Codeforces | Codeforces Round #154 (Div. 2) | 2 | |
| 88 | Points on Line | Codeforces | Codeforces Round #153 (Div. 1) & Codeforces Round #153 (Div. 2) | 2 | |
| 89 | Increase and Decrease | Codeforces | Codeforces Round #151 (Div. 2) | 2 | |
| 90 | Buggy Sorting | Codeforces | Codeforces Round #151 (Div. 2) | 2 | |
| 91 | Two Bags of Potatoes | Codeforces | Codeforces Round #148 (Div. 2) | 2 | |
| 92 | Airport | Codeforces | Codeforces Round #134 (Div. 2) | 2 | |
| 93 | Unlucky Ticket | Codeforces | Codeforces Round #111 (Div. 2) | 2 | |
| 94 | Combination | Codeforces | Codeforces Round #109 (Div. 2) | 2 | |
| 95 | Lucky Conversion | Codeforces | Codeforces Round #104 (Div. 1) & Codeforces Round #104 (Div. 2) | 2 | |
| 96 | Permutation | Codeforces | Codeforces Beta Round #98 (Div. 2) | 2 | |
| 97 | Little Pigs and Wolves | Codeforces | Codeforces Beta Round #87 (Div. 2 Only) | 2 | |
| 98 | Coins | Codeforces | Codeforces Beta Round #54 (Div. 2) | 2 | |
| 99 | Yaroslav and Permutations | Codeforces | Codeforces Round #179 (Div. 2) | 2 | |
| 100 | Dynamic Frog | UVA | 2 | ||
| 101 | Saruman of Many Colours | SPOJ | 2 | ||
| 102 | Watering Grass | UVA | 2 | ||
| 103 | Painting Eggs | Codeforces | Codeforces Round #173 (Div. 2) | 2 | |
| 104 | Cupboards | Codeforces | Codeforces Round #152 (Div. 2) | 2 | |
| 105 | Making a String | Codeforces | AIM Tech Round (Div. 2) | 2 | |
| 106 | Dinner with Emma | Codeforces | Educational Codeforces Round 5 | 2 | |
| 107 | Sorting Railway Cars | Codeforces | Codeforces Round #335 (Div. 1) & Codeforces Round #335 (Div. 2) | 2 | |
| 108 | More Cowbell | Codeforces | Codeforces Round #334 (Div. 2) | 2 | |
| 109 | Alternative Thinking | Codeforces | Codeforces Round #334 (Div. 1) & Codeforces Round #334 (Div. 2) | 2 | |
| 110 | Duff and Weight Lifting | Codeforces | Codeforces Round #326 (Div. 1) & Codeforces Round #326 (Div. 2) | 2 | |
| 111 | GCD Table | Codeforces | Codeforces Round #323 (Div. 1) & Codeforces Round #323 (Div. 2) | 2 | |
| 112 | Inventory | Codeforces | Codeforces Round #315 (Div. 2) | 2 | |
| 113 | Mike and Fun | Codeforces | Codeforces Round #305 (Div. 2) | 2 | |
| 114 | Tourist's Notes | Codeforces | Codeforces Round #300 | 2 | |
| 115 | Covered Path | Codeforces | Codeforces Round #298 (Div. 2) | 2 | |
| 116 | Pasha and String | Codeforces | Codeforces Round #297 (Div. 2) | 2 | |
| 117 | Painting Pebbles | Codeforces | Codeforces Round #289 (Div. 2, ACM ICPC Rules) | 2 | |
| 118 | New Year Book Reading | Codeforces | Good Bye 2014 | 2 | |
| 119 | New Year Permutation | Codeforces | Good Bye 2014 | 2 | |
| 120 | Vanya and Exams | Codeforces | Codeforces Round #280 (Div. 2) | 2 | |
| 121 | Palindrome Transformation | Codeforces | Codeforces Round #277 (Div. 2) | 2 | |
| 122 | Valuable Resources | Codeforces | Codeforces Round #276 (Div. 2) | 2 | |
| 123 | Towers | Codeforces | Codeforces Round #274 (Div. 2) | 2 | |
| 124 | Design Tutorial: Make It Nondeterministic | Codeforces | Codeforces Round #270 | 2 | |
| 125 | 24 Game | Codeforces | Codeforces Round #268 (Div. 1) & Codeforces Round #268 (Div. 2) | 2 | |
| 126 | Appleman and Card Game | Codeforces | Codeforces Round #263 (Div. 2) | 2 | |
| 127 | DZY Loves Chemistry | Codeforces | Codeforces Round #254 (Div. 2) | 2 | |
| 128 | The Child and Toy | Codeforces | Codeforces Round #250 (Div. 2) & Codeforces Round #250 (Div. 1) | 2 | |
| 129 | Football Kit | Codeforces | Codeforces Round #246 (Div. 2) | 2 | |
| 130 | Fox and Cross | Codeforces | Codeforces Round #228 (Div. 2) | 2 | |
| 131 | Fox and Box Accumulation | Codeforces | Codeforces Round #228 (Div. 1) & Codeforces Round #228 (Div. 2) | 2 | |
| 132 | George and Round | Codeforces | Codeforces Round #227 (Div. 2) | 2 | |
| 133 | Bear and Strings | Codeforces | Codeforces Round #226 (Div. 2) | 2 | |
| 134 | Ksenia and Pan Scales | Codeforces | Codeforces Round #224 (Div. 2) | 2 | |
| 135 | New Year Ratings Change | Codeforces | Good Bye 2013 | 2 | |
| 136 | Counting Kangaroos is Fun | Codeforces | Codeforces Round #219 (Div. 1) & Codeforces Round #219 (Div. 2) | 2 | |
| 137 | Fixing Typos | Codeforces | Codeforces Round #211 (Div. 2) | 2 | |
| 138 | Table | Codeforces | Codeforces Round #209 (Div. 2) | 2 | |
| 139 | Group of Students | Codeforces | Codeforces Round #207 (Div. 2) | 2 | |
| 140 | Color the Fence | Codeforces | Codeforces Round #202 (Div. 2) | 2 | |
| 141 | Alternating Current | Codeforces | Codeforces Round #200 (Div. 1) & Codeforces Round #200 (Div. 2) | 2 | |
| 142 | Xenia and Divisors | Codeforces | Codeforces Round #199 (Div. 2) | 2 | |
| 143 | Ciel and Dancing | Codeforces | Codeforces Round #190 (Div. 2) | 2 | |
| 144 | Sail | Codeforces | Codeforces Round #180 (Div. 2) | 2 | |
| 145 | Polo the Penguin and Strings | Codeforces | Codeforces Round #177 (Div. 1) & Codeforces Round #177 (Div. 2) | 2 | |
| 146 | k-Multiple Free Set | Codeforces | Codeforces Round #168 (Div. 1) & Codeforces Round #168 (Div. 2) | 2 | |
| 147 | Squares | Codeforces | Codeforces Round #161 (Div. 2) | 2 | |
| 148 | Alice, Bob and Chocolate | Codeforces | Codeforces Beta Round #6 (Div. 2 Only) | 2 | |
| 149 | Removing Columns | Codeforces | Codeforces Round #283 (Div. 2) & Codeforces Round #283 (Div. 1) | 2 | |
| 150 | Fox And Names | Codeforces | Codeforces Round #290 (Div. 2) & Codeforces Round #290 (Div. 1) | 2 | |
| 151 | Milk Scheduling | SPOJ | 2 | ||
| 152 | Little Elephant and Music | CodeChef | 2 | ||
| 153 | Planning | Codeforces | Codeforces Round #433 (Div. 1, based on Olympiad of Metropolises) & Codeforces Round #433 (Div. 2, based on Olympiad of Metropolises) | 2 | |
| 154 | Leha and Function | Codeforces | Codeforces Round #429 (Div. 1) & Codeforces Round #429 (Div. 2) | 2 | |
| 155 | String Game | Codeforces | Codeforces Round #402 (Div. 1) & Codeforces Round #402 (Div. 2) | 2 | |
| 156 | Alyona and mex | Codeforces | Codeforces Round #381 (Div. 1) & Codeforces Round #381 (Div. 2) | 2 | |
| 157 | Pride | Codeforces | Codeforces Round #446 (Div. 1) & Codeforces Round #446 (Div. 2) | 2 | |
| 158 | Valued Keys | Codeforces | Codeforces Round #409 (rated, Div. 2, based on VK Cup 2017 Round 2) | 2 | |
| 159 | Urbanization | Codeforces | Codeforces Round #382 (Div. 2) | 2 | |
| 160 | Game of Credit Cards | Codeforces | Codeforces Round #401 (Div. 2) | 2 | |
| 161 | Lesha and array splitting | Codeforces | Codeforces Round #390 (Div. 2) | 2 | |
| 162 | Summer sell-off | Codeforces | Codeforces Round #415 (Div. 2) | 2 | |
| 163 | Not Afraid | Codeforces | Codeforces Round #406 (Div. 2) | 2 | |
| 164 | Our Tanya is Crying Out Loud | Codeforces | Codeforces Round #466 (Div. 2) | 2 | |
| 165 | Conan and Agasa play a Card Game | Codeforces | Codecraft-18 and Codeforces Round #458 (Div. 1 + Div. 2, combined) | 2 | |
| 166 | Coin Collector | UVA | 2 | ||
| 167 | Color Stripe | Codeforces | Codeforces Round #135 (Div. 2) | 3 | |
| 168 | Photographer | Codeforces | Codeforces Round #128 (Div. 2) | 3 | |
| 169 | LLPS | Codeforces | Codeforces Round #127 (Div. 2) | 3 | |
| 170 | Lexicographically Maximum Subsequence | Codeforces | Codeforces Round #124 (Div. 1) & Codeforces Round #124 (Div. 2) | 3 | |
| 171 | Vasya and the Bus | Codeforces | Codeforces Round #120 (Div. 2) | 3 | |
| 172 | Median | Codeforces | Codeforces Round #113 (Div. 2) | 3 | |
| 173 | Dress'em in Vests! | Codeforces | VK Cup 2012 Round 1 | 3 | |
| 174 | Ternary Logic | Codeforces | Codeforces Beta Round #97 (Div. 2) | 3 | |
| 175 | Petya and Inequiations | Codeforces | Codeforces Beta Round #85 (Div. 1 Only) & Codeforces Beta Round #85 (Div. 2 Only) | 3 | |
| 176 | Testing Pants for Sadness | Codeforces | Codeforces Beta Round #80 (Div. 1 Only) & Codeforces Beta Round #80 (Div. 2 Only) | 3 | |
| 177 | Regular Bracket Sequence | Codeforces | Codeforces Beta Round #26 (Codeforces format) | 3 | |
| 178 | Burglar and Matches | Codeforces | Codeforces Beta Round #16 (Div. 2 Only) | 3 | |
| 179 | Longest Regular Bracket Sequence | Codeforces | Codeforces Beta Round #5 | 3 | |
| 180 | Greedy Hydra | SPOJ | 3 | ||
| 181 | Football | UVA | 3 | ||
| 182 | Catch Me If You Can | SPOJ | 3 | ||
| 183 | Ilya and Matrix | Codeforces | Codeforces Round #186 (Div. 2) | 3 | |
| 184 | Sockets | Codeforces | Codeforces Round #159 (Div. 2) | 3 | |
| 185 | Simple Strings | Codeforces | Educational Codeforces Round 12 | 3 | |
| 186 | Co-prime Array | Codeforces | Educational Codeforces Round 11 | 3 | |
| 187 | New Reform | Codeforces | Codeforces Round #346 (Div. 2) | 3 | |
| 188 | Bear and String Distance | Codeforces | Educational Codeforces Round 8 | 3 | |
| 189 | Block Towers | Codeforces | 8VC Venture Cup 2016 - Elimination Round | 3 | |
| 190 | Pearls in a Row | Codeforces | Educational Codeforces Round 6 | 3 | |
| 191 | Marina and Vasya | Codeforces | Codeforces Round #324 (Div. 2) | 3 | |
| 192 | "Or" Game | Codeforces | Codeforces Round #320 (Div. 1) [Bayan Thanks-Round] & Codeforces Round #320 (Div. 2) [Bayan Thanks-Round] | 3 | |
| 193 | Order Book | Codeforces | Codeforces Round #317 [AimFund Thanks-Round] (Div. 2) | 3 | |
| 194 | Vanya and Scales | Codeforces | Codeforces Round #308 (Div. 2) | 3 | |
| 195 | School Marks | Codeforces | Codeforces Round #301 (Div. 2) | 3 | |
| 196 | Error Correct System | Codeforces | Codeforces Round #296 (Div. 2) | 3 | |
| 197 | Om Nom and Dark Park | Codeforces | ZeptoLab Code Rush 2015 | 3 | |
| 198 | Ilya and Sticks | Codeforces | Codeforces Round #297 (Div. 2) | 3 | |
| 199 | Anya and Ghosts | Codeforces | Codeforces Round #288 (Div. 2) | 3 | |
| 200 | Misha and Forest | Codeforces | Codeforces Round #285 (Div. 2) & Codeforces Round #285 (Div. 1) | 3 | |
| 201 | Treasure | Codeforces | Codeforces Round #282 (Div. 1) & Codeforces Round #282 (Div. 2) | 3 | |
| 202 | Long Jumps | Codeforces | Codeforces Round #274 (Div. 2) & Codeforces Round #274 (Div. 1) | 3 | |
| 203 | No to Palindromes! | Codeforces | Codeforces Round #265 (Div. 1) & Codeforces Round #265 (Div. 2) | 3 | |
| 204 | Gargari and Bishops | Codeforces | Codeforces Round #264 (Div. 2) | 3 | |
| 205 | Present | Codeforces | Codeforces Round #262 (Div. 2) | 3 | |
| 206 | Painting Fence | Codeforces | Codeforces Round #256 (Div. 2) | 3 | |
| 207 | Andrey and Problem | Codeforces | Codeforces Round #253 (Div. 1) & Codeforces Round #253 (Div. 2) | 3 | |
| 208 | Valera and Fruits | Codeforces | Codeforces Round #252 (Div. 2) | 3 | |
| 209 | The Child and Set | Codeforces | Codeforces Round #250 (Div. 2) | 3 | |
| 210 | Pasha Maximizes | Codeforces | Codeforces Round #249 (Div. 2) | 3 | |
| 211 | Megacity | Codeforces | Codeforces Round #242 (Div. 2) | 3 | |
| 212 | Booking System | Codeforces | Codeforces Round #241 (Div. 2) | 3 | |
| 213 | Guess a number! | Codeforces | Codeforces Round #241 (Div. 2) | 3 | |
| 214 | Mashmokh and Tokens | Codeforces | Codeforces Round #240 (Div. 2) | 3 | |
| 215 | Nuts | Codeforces | Codeforces Round #236 (Div. 2) | 3 | |
| 216 | Sereja and Contests | Codeforces | Codeforces Round #235 (Div. 2) | 3 | |
| 217 | Milking cows | Codeforces | Codeforces Round #225 (Div. 1) & Codeforces Round #225 (Div. 2) | 3 | |
| 218 | Sereja and Stairs | Codeforces | Codeforces Round #223 (Div. 2) | 3 | |
| 219 | Vasya and Public Transport | Codeforces | Codeforces Round #206 (Div. 2) | 3 | |
| 220 | Vasya and Robot | Codeforces | Codeforces Round #206 (Div. 1) & Codeforces Round #206 (Div. 2) | 3 | |
| 221 | Bombs | Codeforces | Codeforces Round #203 (Div. 2) | 3 | |
| 222 | Xenia and Weights | Codeforces | Codeforces Round #197 (Div. 2) | 3 | |
| 223 | Quiz | Codeforces | Codeforces Round #196 (Div. 2) & Codeforces Round #196 (Div. 1) | 3 | |
| 224 | Routine Problem | Codeforces | Codeforces Round #196 (Div. 2) | 3 | |
| 225 | Secrets | Codeforces | Codeforces Round #194 (Div. 1) & Codeforces Round #194 (Div. 2) | 3 | |
| 226 | Purification | Codeforces | Codeforces Round #192 (Div. 1) & Codeforces Round #192 (Div. 2) | 3 | |
| 227 | Snow Footprints | Codeforces | Codeforces Round #180 (Div. 2) | 3 | |
| 228 | Little Girl and Maximum XOR | Codeforces | Codeforces Round #169 (Div. 2) | 3 | |
| 229 | Multithreading | Codeforces | Codeforces Round #165 (Div. 2) | 3 | |
| 230 | Roma and Changing Signs | Codeforces | Codeforces Round #160 (Div. 2) | 3 | |
| 231 | Maxim and Discounts | Codeforces | Codeforces Round #160 (Div. 1) & Codeforces Round #160 (Div. 2) | 3 | |
| 232 | Playing Cubes | Codeforces | Codeforces Round #159 (Div. 2) | 3 | |
| 233 | Dice Tower | Codeforces | Codeforces Round #139 (Div. 2) | 3 | |
| 234 | DNA Alignment | Codeforces | Codeforces Round #295 (Div. 2) & Codeforces Round #295 (Div. 1) | 3 | |
| 235 | Recycling Bottles | Codeforces | Codeforces Round #352 (Div. 1) & Codeforces Round #352 (Div. 2) | 3 | |
| 236 | Heap Operations | Codeforces | Codeforces Round #357 (Div. 2) | 3 | |
| 237 | Santa Claus and Robot | Codeforces | Technocup 2017 - Elimination Round 3 | 3 | |
| 238 | Karen and Game | Codeforces | Codeforces Round #419 (Div. 1) & Codeforces Round #419 (Div. 2) | 3 | |
| 239 | Memory and De-Evolution | Codeforces | Codeforces Round #370 (Div. 2) | 3 | |
| 240 | Voting | Codeforces | Codeforces Round #388 (Div. 2) | 3 | |
| 241 | Cloud of Hashtags | Codeforces | Codeforces Round #401 (Div. 2) | 3 | |
| 242 | Mike and gcd problem | Codeforces | Codeforces Round #410 (Div. 2) | 3 | |
| 243 | Palindromes | Live Archive | 1995 | North America - South Central USA | 3 |
| 244 | Paper Work | Codeforces | CROC-MBTU 2012, Final Round (Online version, Div. 2) | 4 | |
| 245 | Magic, Wizardry and Wonders | Codeforces | Codeforces Round #143 (Div. 2) | 4 | |
| 246 | Well-known Numbers | Codeforces | Codeforces Round #139 (Div. 2) | 4 | |
| 247 | Olympic Medal | Codeforces | Codeforces Round #132 (Div. 2) | 4 | |
| 248 | Hometask | Codeforces | Codeforces Round #131 (Div. 2) | 4 | |
| 249 | Little Elephant and Sorting | Codeforces | Codeforces Round #129 (Div. 2) | 4 | |
| 250 | Growing Mushrooms | Codeforces | Codeforces Round #118 (Div. 2) | 4 | |
| 251 | Matchmaker | Codeforces | VK Cup 2012 Qualification Round 2 | 4 | |
| 252 | Friends or Not | Codeforces | VK Cup 2012 Qualification Round 2 | 4 | |
| 253 | Hometask | Codeforces | Codeforces Round #109 (Div. 1) & Codeforces Round #109 (Div. 2) | 4 | |
| 254 | Division into Teams | Codeforces | Codeforces Round #106 (Div. 2) | 4 | |
| 255 | New Year Snowmen | Codeforces | Codeforces Round #100 | 4 | |
| 256 | Homework | Codeforces | Codeforces Beta Round #79 (Div. 1 Only) & Codeforces Beta Round #79 (Div. 2 Only) | 4 | |
| 257 | Binary Number | Codeforces | Codeforces Beta Round #75 (Div. 2 Only) | 4 | |
| 258 | Cableway | Codeforces | Codeforces Beta Round #74 (Div. 2 Only) | 4 | |
| 259 | Bus Game | Codeforces | Codeforces Beta Round #71 | 4 | |
| 260 | A Student's Dream | Codeforces | Codeforces Beta Round #58 | 4 | |
| 261 | Eternal Victory | Codeforces | Codeforces Beta Round #57 (Div. 2) | 4 | |
| 262 | Lucky Tickets | Codeforces | Codeforces Beta Round #42 (Div. 2) | 4 | |
| 263 | You're Given a String... | Codeforces | Codeforces Beta Round #23 | 4 | |
| 264 | Lorry | Codeforces | Codeforces Beta Round #3 | 4 | |
| 265 | INVITATION FOR TECHOFES | SPOJ | 4 | ||
| 266 | Jersey Politics | PKU | 4 | ||
| 267 | Troops of Sand Monsters | SPOJ | 4 | ||
| 268 | Two Semiknights Meet | Codeforces | Codeforces Round #212 (Div. 2) | 4 | |
| 269 | Subtraction | A2 Online Judge | 4 | ||
| 270 | K-Palindrome | A2 Online Judge | 4 | ||
| 271 | Rebus | Codeforces | Codeforces Round #347 (Div. 1) & Codeforces Round #347 (Div. 2) | 4 | |
| 272 | Mischievous Mess Makers | Codeforces | CROC 2016 - Elimination Round | 4 | |
| 273 | Make Palindrome | Codeforces | Educational Codeforces Round 2 | 4 | |
| 274 | Amr and Chemistry | Codeforces | Codeforces Round #312 (Div. 2) | 4 | |
| 275 | Arthur and Table | Codeforces | Codeforces Round #311 (Div. 2) | 4 | |
| 276 | Case of Fugitive | Codeforces | Codeforces Round #310 (Div. 1) & Codeforces Round #310 (Div. 2) | 4 | |
| 277 | GukiZ hates Boxes | Codeforces | Codeforces Round #307 (Div. 2) | 4 | |
| 278 | Paths and Trees | Codeforces | Codeforces Round #303 (Div. 2) | 4 | |
| 279 | Tavas and Malekas | Codeforces | Codeforces Round #299 (Div. 2) & Codeforces Round #299 (Div. 1) | 4 | |
| 280 | Clique Problem | Codeforces | Codeforces Round #296 (Div. 2) & Codeforces Round #296 (Div. 1) | 4 | |
| 281 | Drazil and Tiles | Codeforces | Codeforces Round #292 (Div. 2) & Codeforces Round #292 (Div. 1) | 4 | |
| 282 | Dreamoon and Sets | Codeforces | Codeforces Round #272 (Div. 2) & Codeforces Round #272 (Div. 1) | 4 | |
| 283 | MUH and House of Cards | Codeforces | Codeforces Round #269 (Div. 2) | 4 | |
| 284 | Two Sets | Codeforces | Codeforces Round #268 (Div. 1) & Codeforces Round #268 (Div. 2) | 4 | |
| 285 | DZY Loves Modification | Codeforces | Codeforces Round #255 (Div. 1) & Codeforces Round #255 (Div. 2) | 4 | |
| 286 | DZY Loves Physics | Codeforces | Codeforces Round #254 (Div. 1) & Codeforces Round #254 (Div. 2) | 4 | |
| 287 | Feed with Candy | Codeforces | Zepto Code Rush 2014 | 4 | |
| 288 | Network Configuration | Codeforces | Coder-Strike 2014 - Round 1 | 4 | |
| 289 | Poster | Codeforces | Coder-Strike 2014 - Round 1 | 4 | |
| 290 | Toy Sum | Codeforces | Codeforces Round #238 (Div. 2) & Codeforces Round #238 (Div. 1) | 4 | |
| 291 | Multitasking | Codeforces | Codeforces Round #225 (Div. 2) | 4 | |
| 292 | Inna and Nine | Codeforces | Codeforces Round #220 (Div. 2) | 4 | |
| 293 | Jeff and Rounding | Codeforces | Codeforces Round #204 (Div. 1) & Codeforces Round #204 (Div. 2) | 4 | |
| 294 | Xenia and Spies | Codeforces | Codeforces Round #199 (Div. 2) | 4 | |
| 295 | Ciel the Commander | Codeforces | Codeforces Round #190 (Div. 1) & Codeforces Round #190 (Div. 2) | 4 | |
| 296 | Special Task | Codeforces | ABBYY Cup 3.0 | 4 | |
| 297 | Fish Weight | Codeforces | Codeforces Round #180 (Div. 1) & Codeforces Round #180 (Div. 2) | 4 | |
| 298 | Shaass and Bookshelf | Codeforces | Codeforces Round #178 (Div. 2) | 4 | |
| 299 | Zero Tree | Codeforces | Codeforces Round #168 (Div. 1) & Codeforces Round #168 (Div. 2) | 4 | |
| 300 | Magical Boxes | Codeforces | Codeforces Round #165 (Div. 1) & Codeforces Round #165 (Div. 2) | 4 | |
| 301 | Tournament | Codeforces | Codeforces Beta Round #27 (Codeforces format, Div. 2) | 4 | |
| 302 | Robin Hood | Codeforces | Codeforces Round #352 (Div. 1) & Codeforces Round #352 (Div. 2) | 4 | |
| 303 | Money Transfers | Codeforces | Codeforces Round #353 (Div. 2) | 4 | |
| 304 | Office Keys | Codeforces | Codeforces Round #424 (Div. 1, rated, based on VK Cup Finals) & Codeforces Round #424 (Div. 2, rated, based on VK Cup Finals) | 4 | |
| 305 | Garland | Codeforces | Codeforces Round #398 (Div. 2) | 4 | |
| 306 | Game of the Rows | Codeforces | Codeforces Round #428 (Div. 2) | 4 | |
| 307 | Text Editor | Codeforces | Codeforces Round #154 (Div. 2) | 5 | |
| 308 | Beauty Pageant | Codeforces | Codeforces Round #151 (Div. 2) | 5 | |
| 309 | Restoring Table | Codeforces | CROC-MBTU 2012, Elimination Round (ACM-ICPC) | 5 | |
| 310 | Old Peykan | Codeforces | Bayan 2012-2013 Elimination Round (ACM ICPC Rules, English statements) | 5 | |
| 311 | Cycles | Codeforces | Codeforces Round #144 (Div. 1) & Codeforces Round #144 (Div. 2) | 5 | |
| 312 | Olympiad | Codeforces | Codeforces Round #137 (Div. 2) | 5 | |
| 313 | Permutations | Codeforces | Codeforces Round #119 (Div. 1) & Codeforces Round #119 (Div. 2) | 5 | |
| 314 | Replacing Digits | Codeforces | VK Cup 2012 Round 2 (Unofficial Div. 2 Edition) | 5 | |
| 315 | Discounts | Codeforces | VK Cup 2012 Round 1 | 5 | |
| 316 | Terse princess | Codeforces | Codeforces Round #105 (Div. 2) | 5 | |
| 317 | Help General | Codeforces | Codeforces Round #102 (Div. 1) & Codeforces Round #102 (Div. 2) | 5 | |
| 318 | Queue | Codeforces | Codeforces Round #101 (Div. 2) | 5 | |
| 319 | New Year Contest | Codeforces | Codeforces Round #100 | 5 | |
| 320 | Spiders | Codeforces | School Regional Team Contest, Saratov, 2011 | 5 | |
| 321 | Fancy Number | Codeforces | Codeforces Beta Round #89 (Div. 2) | 5 | |
| 322 | Lawnmower | Codeforces | Codeforces Beta Round #87 (Div. 1 Only) & Codeforces Beta Round #87 (Div. 2 Only) | 5 | |
| 323 | Newspaper Headline | Codeforces | Codeforces Beta Round #75 (Div. 1 Only) & Codeforces Beta Round #75 (Div. 2 Only) | 5 | |
| 324 | Bets | Codeforces | Codeforces Beta Round #63 (Div. 2) | 5 | |
| 325 | Square Earth? | Codeforces | Codeforces Beta Round #53 | 5 | |
| 326 | What is for dinner? | Codeforces | Codeforces Beta Round #33 (Codeforces format) | 5 | |
| 327 | Hierarchy | Codeforces | Codeforces Beta Round #17 | 5 | |
| 328 | Least Cost Bracket Sequence | Codeforces | Codeforces Beta Round #3 | 5 | |
| 329 | Unordered Subsequence | Codeforces | Codeforces Beta Round #27 (Codeforces format, Div. 2) | 5 | |
| 330 | Game with Points | SGU | 5 | ||
| 331 | Simple Subset | Codeforces | Educational Codeforces Round 12 | 5 | |
| 332 | Running with Obstacles | Codeforces | VK Cup 2016 - Qualification Round 1 | 5 | |
| 333 | Running Track | Codeforces | Codeforces Round #338 (Div. 2) | 5 | |
| 334 | Restaurant | Codeforces | Testing Round #12 | 5 | |
| 335 | Wilbur and Points | Codeforces | Codeforces Round #331 (Div. 2) | 5 | |
| 336 | Gourmet and Banquet | Codeforces | 2015-2016 ACM-ICPC, NEERC, Southern Subregional Contest (Online Mirror, ACM-ICPC Rules, Teams Preferred) | 5 | |
| 337 | Points on Plane | Codeforces | Codeforces Round #319 (Div. 1) & Codeforces Round #319 (Div. 2) | 5 | |
| 338 | Minimization | Codeforces | Codeforces Round #317 [AimFund Thanks-Round] (Div. 1) & Codeforces Round #317 [AimFund Thanks-Round] (Div. 2) | 5 | |
| 339 | Happy Line | Codeforces | Looksery Cup 2015 | 5 | |
| 340 | Haar Features | Codeforces | Looksery Cup 2015 | 5 | |
| 341 | Handshakes | Codeforces | Codeforces Round #298 (Div. 2) | 5 | |
| 342 | Correcting Mistakes | Codeforces | VK Cup 2015 - Round 2 (unofficial online mirror, Div. 1 only) | 5 | |
| 343 | Board Game | Codeforces | VK Cup 2015 - Round 2 (unofficial online mirror, Div. 1 only) | 5 | |
| 344 | Om Nom and Candies | Codeforces | ZeptoLab Code Rush 2015 | 5 | |
| 345 | Name Quest | Codeforces | VK Cup 2015 - Qualification Round 2 | 5 | |
| 346 | Sums of Digits | Codeforces | Codeforces Round #289 (Div. 2, ACM ICPC Rules) | 5 | |
| 347 | Dungeons and Candies | Codeforces | Zepto Code Rush 2014 | 5 | |
| 348 | Prime Swaps | Codeforces | Codeforces Round #246 (Div. 2) | 5 | |
| 349 | Upgrading Array | Codeforces | Codeforces Round #236 (Div. 2) & Codeforces Round #236 (Div. 1) | 5 | |
| 350 | Fox and Card Game | Codeforces | Codeforces Round #228 (Div. 1) & Codeforces Round #228 (Div. 2) | 5 | |
| 351 | George and Number | Codeforces | Codeforces Round #227 (Div. 2) | 5 | |
| 352 | Preparing for the Contest | Codeforces | Codeforces Round #222 (Div. 1) & Codeforces Round #222 (Div. 2) | 5 | |
| 353 | Inna and Pink Pony | Codeforces | Codeforces Round #220 (Div. 2) | 5 | |
| 354 | Renting Bikes | Codeforces | Codeforces Round #211 (Div. 2) | 5 | |
| 355 | Levko and Array Recovery | Codeforces | Codeforces Round #210 (Div. 1) & Codeforces Round #210 (Div. 2) | 5 | |
| 356 | Dima and Hares | Codeforces | Codeforces Round #208 (Div. 2) | 5 | |
| 357 | Two Heaps | Codeforces | Codeforces Round #205 (Div. 2) | 5 | |
| 358 | Read Time | Codeforces | Codeforces Round #200 (Div. 1) & Codeforces Round #200 (Div. 2) | 5 | |
| 359 | Vasily the Bear and Sequence | Codeforces | Codeforces Round #195 (Div. 2) | 5 | |
| 360 | Chips | Codeforces | Codeforces Round #194 (Div. 1) & Codeforces Round #194 (Div. 2) | 5 | |
| 361 | Ciel and Duel | Codeforces | Codeforces Round #190 (Div. 1) & Codeforces Round #190 (Div. 2) | 5 | |
| 362 | Weird Game | Codeforces | Croc Champ 2013 - Round 2 | 5 | |
| 363 | Parallel Programming | Codeforces | Croc Champ 2013 - Qualification Round | 5 | |
| 364 | Balls and Boxes | Codeforces | Codeforces Round #158 (Div. 2) | 5 | |
| 365 | Guilty --- to the kitchen! | Codeforces | Codeforces Beta Round #41 | 5 | |
| 366 | Bear and Tower of Cubes | Codeforces | Codeforces Round #356 (Div. 1) & Codeforces Round #356 (Div. 2) | 5 | |
| 367 | Jury Meeting | Codeforces | Codeforces Round #433 (Div. 1, based on Olympiad of Metropolises) & Codeforces Round #433 (Div. 2, based on Olympiad of Metropolises) | 5 | |
| 368 | An overnight dance in discotheque | Codeforces | Codeforces Round #418 (Div. 2) | 5 | |
| 369 | Hanoi Factory | Codeforces | Codeforces Round #401 (Div. 2) | 5 | |
| 370 | Cartons of milk | Codeforces | Codeforces Round #398 (Div. 2) | 5 | |
| 371 | The Queue | Codeforces | Codeforces Round #398 (Div. 2) | 5 | |
| 372 | Fedor and coupons | Codeforces | Codeforces Round #390 (Div. 2) | 5 | |
| 373 | Maxim and Array | Codeforces | Codeforces Round #374 (Div. 2) | 5 | |
| 374 | Anagram | Codeforces | Codeforces Round #155 (Div. 2) | 6 | |
| 375 | Movie Critics | Codeforces | CROC-MBTU 2012, Final Round (Online version, Div. 2) | 6 | |
| 376 | Game with Coins | Codeforces | CROC-MBTU 2012, Elimination Round (ACM-ICPC) | 6 | |
| 377 | Dispute | Codeforces | Codeforces Round #149 (Div. 2) | 6 | |
| 378 | Towers | Codeforces | Codeforces Round #142 (Div. 1) | 6 | |
| 379 | Naughty Stone Piles | Codeforces | Codeforces Round #140 (Div. 1) & Codeforces Round #140 (Div. 2) | 6 | |
| 380 | Hiring Staff | Codeforces | Codeforces Round #133 (Div. 2) | 6 | |
| 381 | Hot Days | Codeforces | Codeforces Round #132 (Div. 2) | 6 | |
| 382 | Game | Codeforces | Codeforces Round #131 (Div. 1) & Codeforces Round #131 (Div. 2) | 6 | |
| 383 | Trading Business | Codeforces | Croc Champ 2012 - Round 2 | 6 | |
| 384 | File List | Codeforces | VK Cup 2012 Round 3 (Unofficial Div. 2 Edition) | 6 | |
| 385 | New Year Cards | Codeforces | Codeforces Round #100 | 6 | |
| 386 | Zero-One | Codeforces | Codeforces Beta Round #97 (Div. 1) & Codeforces Beta Round #97 (Div. 2) | 6 | |
| 387 | Robbery | Codeforces | Codeforces Beta Round #74 (Div. 1 Only) & Codeforces Beta Round #74 (Div. 2 Only) | 6 | |
| 388 | Beaver | Codeforces | Codeforces Beta Round #71 | 6 | |
| 389 | Train | Codeforces | Codeforces Beta Round #68 | 6 | |
| 390 | The Elder Trolls IV: Oblivon | Codeforces | Codeforces Beta Round #66 | 6 | |
| 391 | Text Messaging | Codeforces | Codeforces Beta Round #64 | 6 | |
| 392 | Partial Teacher | Codeforces | Manthan 2011 | 6 | |
| 393 | Harry Potter and the History of Magic | Codeforces | Codeforces Beta Round #60 | 6 | |
| 394 | Permutations | Codeforces | School Personal Contest #3 (Winter Computer School 2010/11) - Codeforces Beta Round #45 (ACM-ICPC Rules) | 6 | |
| 395 | 3-cycles | Codeforces | Codeforces Beta Round #40 (Div. 2) | 6 | |
| 396 | Company Income Growth | Codeforces | School Team Contest #1 (Winter Computer School 2010/11) | 6 | |
| 397 | Animals | Codeforces | Codeforces Beta Round #35 (Div. 2) | 6 | |
| 398 | Segments | Codeforces | Codeforces Beta Round #22 (Div. 2 Only) | 6 | |
| 399 | Washer, Dryer, Folder | Codeforces | MemSQL Start[c]UP 2.0 - Round 1 | 6 | |
| 400 | Train Passengers | A2 Online Judge | 6 | ||
| 401 | Fishing Soldier | A2 Online Judge | 6 | ||
| 402 | Snakes | A2 Online Judge | 6 | ||
| 403 | International Olympiad | Codeforces | CROC 2016 - Final Round [Private, For Onsite Finalists Only] | 6 | |
| 404 | Table Compression | Codeforces | Codeforces Round #345 (Div. 1) & Codeforces Round #345 (Div. 2) | 6 | |
| 405 | Array GCD | Codeforces | AIM Tech Round (Div. 1) & AIM Tech Round (Div. 2) | 6 | |
| 406 | Ants in Leaves | Codeforces | Educational Codeforces Round 7 | 6 | |
| 407 | Anton and Ira | Codeforces | Codeforces Round #324 (Div. 2) | 6 | |
| 408 | Invariance of Tree | Codeforces | Codeforces Round #319 (Div. 1) & Codeforces Round #319 (Div. 2) | 6 | |
| 409 | Vanya and Brackets | Codeforces | Codeforces Round #308 (Div. 2) | 6 | |
| 410 | Brackets in Implications | Codeforces | Codeforces Round #306 (Div. 2) | 6 | |
| 411 | Looksery Party | Codeforces | Looksery Cup 2015 | 6 | |
| 412 | Arthur and Walls | Codeforces | Codeforces Round #297 (Div. 2) | 6 | |
| 413 | ???? ?? ?????? - 2 (round version) | Codeforces | VK Cup 2015 - Round 1 | 6 | |
| 414 | Cubes | Codeforces | Codeforces Round #295 (Div. 2) & Codeforces Round #295 (Div. 1) | 6 | |
| 415 | Arthur and Brackets | Codeforces | Codeforces Round #288 (Div. 2) | 6 | |
| 416 | Distributing Parts | Codeforces | Codeforces Round #283 (Div. 2) | 6 | |
| 417 | Restoring Increasing Sequence | Codeforces | Codeforces Round #279 (Div. 2) | 6 | |
| 418 | LIS of Sequence | Codeforces | Codeforces Round #277 (Div. 2) | 6 | |
| 419 | Kindergarten | Codeforces | Codeforces Round #276 (Div. 1) | 6 | |
| 420 | Artem and Array | Codeforces | Codeforces Round #253 (Div. 1) | 6 | |
| 421 | Police Patrol | Codeforces | Codeforces Round #244 (Div. 2) | 6 | |
| 422 | Sereja and Table | Codeforces | Codeforces Round #243 (Div. 1) | 6 | |
| 423 | Cunning Gena | Codeforces | RCC 2014 Warmup (Div. 2) & RCC 2014 Warmup (Div. 1) | 6 | |
| 424 | Jeopardy! | Codeforces | Coder-Strike 2014 - Round 2 | 6 | |
| 425 | Mittens | Codeforces | Codeforces Round #217 (Div. 2) | 6 | |
| 426 | Sereja and the Arrangement of Numbers | Codeforces | Codeforces Round #215 (Div. 1) & Codeforces Round #215 (Div. 2) | 6 | |
| 427 | Dima and Containers | Codeforces | Codeforces Round #208 (Div. 2) | 6 | |
| 428 | Compartments | Codeforces | Codeforces Round #207 (Div. 1) & Codeforces Round #207 (Div. 2) | 6 | |
| 429 | Number Transformation II | Codeforces | Codeforces Round #201 (Div. 1) & Codeforces Round #201 (Div. 2) | 6 | |
| 430 | Banana | Codeforces | MemSQL start[c]up Round 2 - online version | 6 | |
| 431 | Main Sequence | Codeforces | Codeforces Round #176 (Div. 1) & Codeforces Round #176 (Div. 2) | 6 | |
| 432 | Beautiful Decomposition | Codeforces | Codeforces Round #171 (Div. 2) | 6 | |
| 433 | Below the Diagonal | Codeforces | Codeforces Round #163 (Div. 2) | 6 | |
| 434 | Sum | Codeforces | Codeforces Round #159 (Div. 2) | 6 | |
| 435 | Wonderful Randomized Sum | Codeforces | Codeforces Beta Round #33 (Codeforces format) | 6 | |
| 436 | Trains and Statistic | Codeforces | Codeforces Round #353 (Div. 2) | 6 | |
| 437 | Trees | Codeforces | Codeforces Beta Round #54 (Div. 2) | 6 | |
| 438 | Ithea Plays With Chtholly | Codeforces | Codeforces Round #449 (Div. 1) & Codeforces Round #449 (Div. 2) | 6 | |
| 439 | Divide and conquer | SGU | 6 | ||
| 440 | World Eater Brothers | Codeforces | Codeforces Round #148 (Div. 1) & Codeforces Round #148 (Div. 2) | 7 | |
| 441 | Boring Partition | Codeforces | Codeforces Round #148 (Div. 1) & Codeforces Round #148 (Div. 2) | 7 | |
| 442 | The table | Codeforces | Codeforces Round #140 (Div. 1) | 7 | |
| 443 | Demonstration | Codeforces | Codeforces Round #121 (Div. 1) & Codeforces Round #121 (Div. 2) | 7 | |
| 444 | Geometry Horse | Codeforces | Codeforces Round #115 | 7 | |
| 445 | Zebra Tower | Codeforces | VK Cup 2012 Qualification Round 2 | 7 | |
| 446 | Digits Permutations | Codeforces | Codeforces Beta Round #99 (Div. 1) & Codeforces Beta Round #99 (Div. 2) | 7 | |
| 447 | Hobbits' Party | Codeforces | Codeforces Testing Round #2 | 7 | |
| 448 | Russian Roulette | Codeforces | Codeforces Beta Round #80 (Div. 1 Only) & Codeforces Beta Round #80 (Div. 2 Only) | 7 | |
| 449 | Lucky Numbers | Codeforces | Codeforces Beta Round #77 (Div. 1 Only) | 7 | |
| 450 | End of Exams | Codeforces | Codeforces Beta Round #76 (Div. 1 Only) & Codeforces Beta Round #76 (Div. 2 Only) | 7 | |
| 451 | Beavermuncher-0xFF | Codeforces | Codeforces Beta Round #69 (Div. 1 Only) & Codeforces Beta Round #69 (Div. 2 Only) | 7 | |
| 452 | Plus and xor | Codeforces | All-Ukrainian School Olympiad in Informatics | 7 | |
| 453 | Restoration of the Permutation | Codeforces | Manthan 2011 | 7 | |
| 454 | Three Base Stations | Codeforces | Codeforces Beta Round #48 | 7 | |
| 455 | TCMCF+++ | Codeforces | School Team Contest #3 (Winter Computer School 2010/11) | 7 | |
| 456 | Event Dates | Codeforces | School Team Contest #3 (Winter Computer School 2010/11) | 7 | |
| 457 | Old Berland Language | Codeforces | Codeforces Beta Round #37 | 7 | |
| 458 | Computer Game | Codeforces | Codeforces Beta Round #37 | 7 | |
| 459 | Seller Bob | Codeforces | Codeforces Beta Round #18 (Div. 2 Only) | 7 | |
| 460 | Intellectual Inquiry | Codeforces | CROC 2016 - Elimination Round | 7 | |
| 461 | Bear and Contribution | Codeforces | VK Cup 2016 - Round 1 | 7 | |
| 462 | Road Improvement | Codeforces | VK Cup 2016 - Qualification Round 2 | 7 | |
| 463 | Package Delivery | Codeforces | 8VC Venture Cup 2016 - Final Round | 7 | |
| 464 | New Year and Three Musketeers | Codeforces | Good Bye 2015 | 7 | |
| 465 | Bulbo | Codeforces | Bubble Cup 8 - Finals [Online Mirror] | 7 | |
| 466 | Nudist Beach | Codeforces | Codeforces Round #309 (Div. 1) | 7 | |
| 467 | Quest | Codeforces | VK Cup 2015 - Round 3 (unofficial online mirror, Div. 1 only) | 7 | |
| 468 | Group Photo 2 (online mirror version) | Codeforces | VK Cup 2015 - Round 1 (unofficial online mirror, Div. 1 only) | 7 | |
| 469 | Social Network | Codeforces | VK Cup 2015 - Round 1 | 7 | |
| 470 | Chicken or Fish? | Codeforces | VK Cup 2015 - Qualification Round 1 | 7 | |
| 471 | Arthur and Questions | Codeforces | Codeforces Round #293 (Div. 2) | 7 | |
| 472 | Kamal-ol-molk's Painting | Codeforces | Bayan 2015 Contest Warm Up | 7 | |
| 473 | Distributed Join | Codeforces | MemSQL Start[c]UP 2.0 - Round 2 | 7 | |
| 474 | Special Grid | Codeforces | Codeforces Round #249 (Div. 2) | 7 | |
| 475 | Guess the Tree | Codeforces | Codeforces Round #245 (Div. 1) & Codeforces Round #245 (Div. 2) | 7 | |
| 476 | Population Size | Codeforces | Codeforces Round #241 (Div. 2) | 7 | |
| 477 | Free Market | Codeforces | Codeforces Round #213 (Div. 1) & Codeforces Round #213 (Div. 2) | 7 | |
| 478 | Fools and Foolproof Roads | Codeforces | Codeforces Round #212 (Div. 2) | 7 | |
| 479 | Jeff and Permutation | Codeforces | Codeforces Round #204 (Div. 1) | 7 | |
| 480 | Students' Revenge | Codeforces | Codeforces Round #193 (Div. 2) | 7 | |
| 481 | Sheldon and Ice Pieces | Codeforces | Testing Round #8 | 7 | |
| 482 | Lovely Matrix | Codeforces | Codeforces Round #168 (Div. 1) | 7 | |
| 483 | Black and White Tree | Codeforces | Codeforces Round #158 (Div. 2) | 7 | |
| 484 | Number Transformation | Codeforces | Codeforces Round #153 (Div. 1) & Codeforces Round #153 (Div. 2) | 7 | |
| 485 | Educational Game | Codeforces | ABBYY Cup 2.0 - Hard | 7 | |
| 486 | Educational Game | Codeforces | ABBYY Cup 2.0 - Hard | 7 | |
| 487 | Range Increments | Codeforces | VK Cup 2012 Round 3 (Unofficial Div. 2 Edition) | 7 | |
| 488 | Big Maximum Sum | Codeforces | Codeforces Beta Round #67 (Div. 2) | 7 | |
| 489 | Dima and Horses | Codeforces | Codeforces Round #167 (Div. 2) & Codeforces Round #167 (Div. 1) | 7 | |
| 490 | Hamiltonian Cycle | Live Archive | 1997 | Latin America - South America | 7 |
| 491 | Ant Man | Codeforces | Codeforces Round #366 (Div. 1) & Codeforces Round #366 (Div. 2) | 7 | |
| 492 | Change-free | Codeforces | Codeforces Round #398 (Div. 2) | 7 | |
| 493 | Sweets for Everyone! | Codeforces | Codeforces Round #152 (Div. 2) & Codeforces Round #152 (Div. 1) | 8 | |
| 494 | T-decomposition | Codeforces | Codeforces Round #147 (Div. 2) | 8 | |
| 495 | Merging Two Decks | Codeforces | Codeforces Round #145 (Div. 2, ACM-ICPC Rules) & Codeforces Round #145 (Div. 1, ACM-ICPC Rules) | 8 | |
| 496 | Trails and Glades | Codeforces | VK Cup 2012 Finals, Practice Session | 8 | |
| 497 | Hamming Distance | Codeforces | Codeforces Round #122 (Div. 1) & Codeforces Round #122 (Div. 2) | 8 | |
| 498 | Optimal Sum | Codeforces | Codeforces Round #117 (Div. 2) | 8 | |
| 499 | Name | Codeforces | Codeforces Round #116 (Div. 2, ACM-ICPC Rules) | 8 | |
| 500 | Competition | Codeforces | Codeforces Round #103 (Div. 2) | 8 | |
| 501 | Swaps | Codeforces | Codeforces Testing Round #3 | 8 | |
| 502 | Constants in the language of Shakespeare | Codeforces | Codeforces Beta Round #96 (Div. 1) | 8 | |
| 503 | E-reader Display | Codeforces | Codeforces Beta Round #93 (Div. 1 Only) & Codeforces Beta Round #93 (Div. 2 Only) | 8 | |
| 504 | Brackets | Codeforces | Codeforces Beta Round #92 (Div. 1 Only) & Codeforces Beta Round #92 (Div. 2 Only) | 8 | |
| 505 | Castle | Codeforces | Codeforces Beta Round #79 (Div. 1 Only) | 8 | |
| 506 | Polycarp's Picture Gallery | Codeforces | Yandex.Algorithm Open 2011 Qualification 1 | 8 | |
| 507 | FreeDiv | Codeforces | Codeforces Beta Round #66 | 8 | |
| 508 | Need For Brake | Codeforces | Codeforces Beta Round #66 | 8 | |
| 509 | Team Arrangement | Codeforces | Codeforces Beta Round #55 (Div. 2) | 8 | |
| 510 | Calendar | Codeforces | Codeforces Beta Round #54 (Div. 2) | 8 | |
| 511 | Director | Codeforces | School Team Contest #3 (Winter Computer School 2010/11) | 8 | |
| 512 | Triminoes | Codeforces | School Team Contest #2 (Winter Computer School 2010/11) | 8 | |
| 513 | C*++ Calculations | Codeforces | School Team Contest #1 (Winter Computer School 2010/11) | 8 | |
| 514 | Tricky and Clever Password | Codeforces | Codeforces Beta Round #30 (Codeforces format) | 8 | |
| 515 | Deletion of Repeats | Codeforces | Codeforces Beta Round #19 | 8 | |
| 516 | LCS Again | Codeforces | Codeforces Round #320 (Div. 1) [Bayan Thanks-Round] & Codeforces Round #320 (Div. 2) [Bayan Thanks-Round] | 8 | |
| 517 | CNF 2 | Codeforces | Codeforces Round #317 [AimFund Thanks-Round] (Div. 1) & Codeforces Round #317 [AimFund Thanks-Round] (Div. 2) | 8 | |
| 518 | New Language | Codeforces | Codeforces Round #315 (Div. 1) & Codeforces Round #315 (Div. 2) | 8 | |
| 519 | Shop | Codeforces | Codeforces Round #295 (Div. 1) | 8 | |
| 520 | Alex and Complicated Task | Codeforces | Codeforces Round #267 (Div. 2) | 8 | |
| 521 | Cardboard Box | Codeforces | Zepto Code Rush 2014 | 8 | |
| 522 | Square Tiling | Codeforces | Codeforces Round #246 (Div. 2) | 8 | |
| 523 | Mashmokh and Water Tanks | Codeforces | Codeforces Round #240 (Div. 1) | 8 | |
| 524 | Maze 1D | Codeforces | Codeforces Round #237 (Div. 2) | 8 | |
| 525 | Dominoes | Codeforces | Codeforces Round #231 (Div. 2) | 8 | |
| 526 | Bags and Coins | Codeforces | Codeforces Round #207 (Div. 1) | 8 | |
| 527 | Antichain | Codeforces | Codeforces Round #205 (Div. 2) | 8 | |
| 528 | Three Swaps | Codeforces | Codeforces Round #197 (Div. 2) | 8 | |
| 529 | Ilya and Two Numbers | Codeforces | Codeforces Round #186 (Div. 2) | 8 | |
| 530 | Memory for Arrays | Codeforces | Croc Champ 2013 - Finals (online version, Div. 1) | 8 | |
| 531 | Roads in Yusland | Codeforces | Codeforces Round #352 (Div. 1) | 8 | |
| 532 | Factorial | Codeforces | Unknown Language Round #1 | 8 | |
| 533 | Road Repairs | Codeforces | Codeforces Round #145 (Div. 1, ACM-ICPC Rules) | 9 | |
| 534 | Beaver's Calculator 1.0 | Codeforces | Abbyy Cup 2.0 - Final (unofficial) | 9 | |
| 535 | Beaver's Calculator 1.0 | Codeforces | Abbyy Cup 2.0 - Final (unofficial) | 9 | |
| 536 | Beaver's Calculator 1.0 | Codeforces | Abbyy Cup 2.0 - Final (unofficial) | 9 | |
| 537 | Transportation | Codeforces | Codeforces Round #128 (Div. 2) | 9 | |
| 538 | The Next Good String | Codeforces | Codeforces Round #124 (Div. 1) | 9 | |
| 539 | Metro Scheme | Codeforces | Codeforces Round #121 (Div. 1) | 9 | |
| 540 | T-shirt | Codeforces | Croc Champ 2012 - Final | 9 | |
| 541 | Power Defence | Codeforces | Codeforces Round #115 | 9 | |
| 542 | Deputies | Codeforces | Croc Champ 2012 - Round 1 | 9 | |
| 543 | Shoe Store | Codeforces | Codeforces Round #113 (Div. 2) | 9 | |
| 544 | Two progressions | Codeforces | Codeforces Testing Round #2 | 9 | |
| 545 | Luck is in Numbers | Codeforces | School Regional Team Contest, Saratov, 2011 | 9 | |
| 546 | Grocer's Problem | Codeforces | Codeforces Beta Round #75 (Div. 1 Only) | 9 | |
| 547 | Tetris revisited | Codeforces | Yandex.Algorithm 2011 Round 2 | 9 | |
| 548 | Track | Codeforces | Codeforces Beta Round #72 (Div. 1 Only) & Codeforces Beta Round #72 (Div. 2 Only) | 9 | |
| 549 | Mice | Codeforces | All-Ukrainian School Olympiad in Informatics | 9 | |
| 550 | Presents | Codeforces | Unknown Language Round #1 | 9 | |
| 551 | Table | Codeforces | Unknown Language Round #1 | 9 | |
| 552 | Trial for Chief | Codeforces | Codeforces Beta Round #37 | 9 | |
| 553 | King's Problem? | Codeforces | Codeforces Beta Round #30 (Codeforces format) | 9 | |
| 554 | Bear and Paradox | Codeforces | VK Cup 2016 - Round 1 | 9 | |
| 555 | Raffles | Codeforces | 8VC Venture Cup 2016 - Elimination Round | 9 | |
| 556 | Birthday | Codeforces | AIM Tech Round (Div. 1) | 9 | |
| 557 | Walking! | Codeforces | Codeforces Round #320 (Div. 1) [Bayan Thanks-Round] | 9 | |
| 558 | Replicating Processes | Codeforces | VK Cup 2015 - Finals, online mirror | 9 | |
| 559 | Berland Local Positioning System | Codeforces | Codeforces Round #298 (Div. 2) | 9 | |
| 560 | Mr. Kitayuta vs. Bamboos | Codeforces | Codeforces Round #286 (Div. 2) & Codeforces Round #286 (Div. 1) | 9 | |
| 561 | New York Hotel | Codeforces | Testing Round #11 | 9 | |
| 562 | Levko and Game | Codeforces | Codeforces Round #210 (Div. 1) | 9 | |
| 563 | Pumping Stations | Codeforces | Codeforces Round #200 (Div. 1) | 9 | |
| 564 | Candies Game | Codeforces | Codeforces Round #198 (Div. 1) | 9 | |
| 565 | Binary Key | Codeforces | Codeforces Round #193 (Div. 2) | 9 | |
| 566 | The Red Button | Codeforces | MemSQL start[c]up Round 1 | 9 | |
| 567 | Ciel and Flipboard | Codeforces | Codeforces Round #190 (Div. 1) | 9 | |
| 568 | Have You Ever Heard About the Word? | Codeforces | Codeforces Round #189 (Div. 1) | 9 | |
| 569 | Optimizer | Codeforces | Testing Round #6 | 9 | |
| 570 | Ever-Hungry Krakozyabra | Codeforces | Codeforces Round #426 (Div. 1) & Codeforces Round #426 (Div. 2) | 9 | |
| 571 | Huffman Coding on Segment | Codeforces | Codeforces Round #364 (Div. 1) | 9 | |
| 572 | Heaven Tour | Codeforces | Codeforces Round #119 (Div. 1) | 10 | |
| 573 | Candy Shop | Codeforces | Croc Champ 2012 - Final | 10 | |
| 574 | Interval Coloring | Codeforces | Unknown Language Round #3 | 10 | |
| 575 | Fire and Ice | Codeforces | Codeforces Beta Round #74 (Div. 1 Only) | 10 | |
| 576 | Oil | Codeforces | Unknown Language Round #2 | 10 | |
| 577 | Goshtasp, Vishtasp and Eidi | Codeforces | Unknown Language Round #2 | 10 | |
| 578 | Snow sellers | Codeforces | School Personal Contest #3 (Winter Computer School 2010/11) - Codeforces Beta Round #45 (ACM-ICPC Rules) | 10 | |
| 579 | Forward, march! | Codeforces | Codeforces Beta Round #11 | 10 | |
| 580 | Dynamic Programming | A2 Online Judge | 10 | ||
| 581 | To Hack or not to Hack | Codeforces | CROC 2016 - Final Round [Private, For Onsite Finalists Only] | 10 | |
| 582 | Frog Fights | Codeforces | Codeforces Round #342 (Div. 2) | 10 | |
| 583 | Agricultural Archaeology | Codeforces | 2015-2016 ACM-ICPC, NEERC, Southern Subregional Contest (Online Mirror, ACM-ICPC Rules, Teams Preferred) | 10 | |
| 584 | Kojiro and Furrari | Codeforces | Codeforces Round #322 (Div. 2) | 10 | |
| 585 | Bear and Bowling | Codeforces | Codeforces Round #318 [RussianCodeCup Thanks-Round] (Div. 1) | 10 | |
| 586 | Summer Dichotomy | Codeforces | Codeforces Round #300 | 10 | |
| 587 | Berland Miners | Codeforces | VK Cup 2015 - Round 2 (unofficial online mirror, Div. 1 only) | 10 | |
| 588 | Spiders Evil Plan | Codeforces | ZeptoLab Code Rush 2015 | 10 | |
| 589 | An easy problem about trees | Codeforces | MemSQL Start[c]UP 2.0 - Round 2 | 10 | |
| 590 | Stock Trading | Codeforces | Rockethon 2014 | 10 | |
| 591 | The Tournament | Codeforces | Rockethon 2014 | 10 | |
| 592 | Summer Reading | Codeforces | Codeforces Round #217 (Div. 2) | 10 | |
| 593 | Buy One, Get One Free | Codeforces | MemSQL start[c]up Round 2 - online version | 10 | |
| 594 | Sheep | Codeforces | Croc Champ 2013 - Finals (online version, Div. 1) | 10 | |
| 595 | Greedy Petya | Codeforces | April Fools Day Contest 2013 | 10 | |
| 596 | Goats and Wolves | Codeforces | School Team Contest #3 (Winter Computer School 2010/11) | 10 | |
| 597 | Organizing a Race | Codeforces | Codeforces Round #352 (Div. 1) | 10 | |
| 598 | Chess Championship | Codeforces | Codeforces Round #382 (Div. 1) | 10 | |
| 599 | Restore the Tree | Codeforces | Codeforces Round #440 (Div. 1, based on Technocup 2018 Elimination Round 2) | 10 |