| Problem Name | Online Judge | Year | Contest | Difficulty Level | |
|---|---|---|---|---|---|
| 1 | Theatre Square | Codeforces | Codeforces Beta Round #1 | 1 | |
| 2 | Winner | Codeforces | Codeforces Beta Round #2 | 1 | |
| 3 | Shortest path of the king | Codeforces | Codeforces Beta Round #3 | 1 | |
| 4 | Watermelon | Codeforces | Codeforces Beta Round #4 (Div. 2 Only) | 1 | |
| 5 | Triangle | Codeforces | Codeforces Beta Round #6 (Div. 2 Only) | 1 | |
| 6 | Die Roll | Codeforces | Codeforces Beta Round #9 (Div. 2 Only) | 1 | |
| 7 | IQ test | Codeforces | Codeforces Beta Round #25 (Div. 2 Only) | 1 | |
| 8 | Almost Prime | Codeforces | Codeforces Beta Round #26 (Codeforces format) | 1 | |
| 9 | Reconnaissance 2 | Codeforces | Codeforces Beta Round #34 (Div. 2) | 1 | |
| 10 | Towers | Codeforces | Codeforces Beta Round #37 | 1 | |
| 11 | Army | Codeforces | School Personal Contest #1 (Winter Computer School 2010/11) - Codeforces Beta Round #38 (ACM-ICPC Rules) | 1 | |
| 12 | Translation | Codeforces | Codeforces Beta Round #40 (Div. 2) | 1 | |
| 13 | Football | Codeforces | Codeforces Beta Round #42 (Div. 2) | 1 | |
| 14 | Domino piling | Codeforces | Codeforces Beta Round #47 | 1 | |
| 15 | Chat room | Codeforces | Codeforces Beta Round #54 (Div. 2) | 1 | |
| 16 | Word | Codeforces | Codeforces Beta Round #55 (Div. 2) | 1 | |
| 17 | Ultra-Fast Mathematician | Codeforces | Codeforces Beta Round #57 (Div. 2) | 1 | |
| 18 | Young Physicist | Codeforces | Codeforces Beta Round #63 (Div. 2) | 1 | |
| 19 | Way Too Long Words | Codeforces | Codeforces Beta Round #65 (Div. 2) | 1 | |
| 20 | Life Without Zeros | Codeforces | Codeforces Beta Round #67 (Div. 2) | 1 | |
| 21 | Panoramix's Prediction | Codeforces | Codeforces Beta Round #69 (Div. 2 Only) | 1 | |
| 22 | Toy Army | Codeforces | Codeforces Beta Round #72 (Div. 2 Only) | 1 | |
| 23 | Chips | Codeforces | Codeforces Beta Round #75 (Div. 2 Only) | 1 | |
| 24 | Football | Codeforces | Codeforces Beta Round #77 (Div. 2 Only) | 1 | |
| 25 | Nearly Lucky Number | Codeforces | Codeforces Beta Round #84 (Div. 2 Only) | 1 | |
| 26 | Petya and Strings | Codeforces | Codeforces Beta Round #85 (Div. 2 Only) | 1 | |
| 27 | Cifera | Codeforces | Codeforces Beta Round #86 (Div. 2 Only) | 1 | |
| 28 | Tram | Codeforces | Codeforces Beta Round #87 (Div. 2 Only) | 1 | |
| 29 | String Task | Codeforces | Codeforces Beta Round #89 (Div. 2) | 1 | |
| 30 | Epic Game | Codeforces | Codeforces Beta Round #90 | 1 | |
| 31 | Lucky Division | Codeforces | Codeforces Beta Round #91 (Div. 2 Only) | 1 | |
| 32 | The number of positions | Codeforces | Codeforces Beta Round #92 (Div. 2 Only) | 1 | |
| 33 | Cookies | Codeforces | Codeforces Beta Round #94 (Div. 2 Only) | 1 | |
| 34 | cAPS lOCK | Codeforces | Codeforces Beta Round #95 (Div. 2) | 1 | |
| 35 | HQ9+ | Codeforces | Codeforces Beta Round #96 (Div. 2) | 1 | |
| 36 | Presents | Codeforces | Codeforces Beta Round #97 (Div. 2) | 1 | |
| 37 | Petr and Book | Codeforces | Codeforces Beta Round #99 (Div. 2) | 1 | |
| 38 | Amusing Joke | Codeforces | Codeforces Round #101 (Div. 2) | 1 | |
| 39 | Arrival of the General | Codeforces | Codeforces Round #103 (Div. 2) | 1 | |
| 40 | Lucky Ticket | Codeforces | Codeforces Round #104 (Div. 2) | 1 | |
| 41 | Insomnia cure | Codeforces | Codeforces Round #105 (Div. 2) | 1 | |
| 42 | Business trip | Codeforces | Codeforces Round #106 (Div. 2) | 1 | |
| 43 | Soft Drinking | Codeforces | Codeforces Round #107 (Div. 2) | 1 | |
| 44 | Marks | Codeforces | Codeforces Round #108 (Div. 2) | 1 | |
| 45 | I_love_\%username\% | Codeforces | Codeforces Round #109 (Div. 2) | 1 | |
| 46 | Twins | Codeforces | Codeforces Round #111 (Div. 2) | 1 | |
| 47 | Supercentral Point | Codeforces | Codeforces Round #112 (Div. 2) | 1 | |
| 48 | Cut Ribbon | Codeforces | Codeforces Round #119 (Div. 2) | 1 | |
| 49 | Hexadecimal's theorem | Codeforces | Codeforces Round #125 (Div. 2) | 1 | |
| 50 | Dubstep | Codeforces | Codeforces Round #130 (Div. 2) | 1 | |
| 51 | System of Equations | Codeforces | Codeforces Round #131 (Div. 2) | 1 | |
| 52 | k-String | Codeforces | Codeforces Round #135 (Div. 2) | 1 | |
| 53 | Parallelepiped | Codeforces | Codeforces Round #138 (Div. 2) | 1 | |
| 54 | Is your horseshoe on the other hoof? | Codeforces | Codeforces Round #141 (Div. 2) | 1 | |
| 55 | Dragons | Codeforces | Codeforces Round #142 (Div. 2) | 1 | |
| 56 | Team | Codeforces | Codeforces Round #143 (Div. 2) | 1 | |
| 57 | Perfect Permutation | Codeforces | Codeforces Round #144 (Div. 2) | 1 | |
| 58 | Boy or Girl | Codeforces | Codeforces Round #146 (Div. 2) | 1 | |
| 59 | Free Cash | Codeforces | Codeforces Round #147 (Div. 2) | 1 | |
| 60 | Greg's Workout | Codeforces | Codeforces Round #156 (Div. 2) | 1 | |
| 61 | Roma and Lucky Numbers | Codeforces | Codeforces Round #160 (Div. 2) | 1 | |
| 62 | Beautiful Matrix | Codeforces | Codeforces Round #161 (Div. 2) | 1 | |
| 63 | Colorful Stones (Simplified Edition) | Codeforces | Codeforces Round #162 (Div. 2) | 1 | |
| 64 | Stones on the Table | Codeforces | Codeforces Round #163 (Div. 2) | 1 | |
| 65 | Games | Codeforces | Codeforces Round #164 (Div. 2) | 1 | |
| 66 | Fancy Fence | Codeforces | Codeforces Round #165 (Div. 2) | 1 | |
| 67 | Beautiful Year | Codeforces | Codeforces Round #166 (Div. 2) | 1 | |
| 68 | Dima and Friends | Codeforces | Codeforces Round #167 (Div. 2) | 1 | |
| 69 | Lights Out | Codeforces | Codeforces Round #168 (Div. 2) | 1 | |
| 70 | Lunch Rush | Codeforces | Codeforces Round #169 (Div. 2) | 1 | |
| 71 | Circle Line | Codeforces | Codeforces Round #170 (Div. 2) | 1 | |
| 72 | Word Capitalization | Codeforces | Codeforces Round #172 (Div. 2) | 1 | |
| 73 | Bit++ | Codeforces | Codeforces Round #173 (Div. 2) | 1 | |
| 74 | Slightly Decreasing Permutations | Codeforces | Codeforces Round #175 (Div. 2) | 1 | |
| 75 | Shaass and Oskols | Codeforces | Codeforces Round #178 (Div. 2) | 1 | |
| 76 | Array | Codeforces | Codeforces Round #181 (Div. 2) | 1 | |
| 77 | Ilya and Bank Account | Codeforces | Codeforces Round #186 (Div. 2) | 1 | |
| 78 | Even Odds | Codeforces | Codeforces Round #188 (Div. 2) | 1 | |
| 79 | Magic Numbers | Codeforces | Codeforces Round #189 (Div. 2) | 1 | |
| 80 | Flipping Game | Codeforces | Codeforces Round #191 (Div. 2) | 1 | |
| 81 | Cakeminator | Codeforces | Codeforces Round #192 (Div. 2) | 1 | |
| 82 | Candy Bags | Codeforces | Codeforces Round #194 (Div. 2) | 1 | |
| 83 | Puzzles | Codeforces | Codeforces Round #196 (Div. 2) | 1 | |
| 84 | Helpful Maths | Codeforces | Codeforces Round #197 (Div. 2) | 1 | |
| 85 | Magnets | Codeforces | Codeforces Round #200 (Div. 2) | 1 | |
| 86 | Cinema Line | Codeforces | Codeforces Round #202 (Div. 2) | 1 | |
| 87 | TL | Codeforces | Codeforces Round #203 (Div. 2) | 1 | |
| 88 | Jeff and Digits | Codeforces | Codeforces Round #204 (Div. 2) | 1 | |
| 89 | Domino | Codeforces | Codeforces Round #205 (Div. 2) | 1 | |
| 90 | Valera and Plates | Codeforces | Codeforces Round #216 (Div. 2) | 1 | |
| 91 | Playing with Dice | Codeforces | Codeforces Round #222 (Div. 2) | 1 | |
| 92 | Sereja and Dima | Codeforces | Codeforces Round #223 (Div. 2) | 1 | |
| 93 | Coder | Codeforces | Codeforces Round #225 (Div. 2) | 1 | |
| 94 | Bear and Raspberry | Codeforces | Codeforces Round #226 (Div. 2) | 1 | |
| 95 | Fox and Number Game | Codeforces | Codeforces Round #228 (Div. 2) | 1 | |
| 96 | Vanya and Cards | Codeforces | Codeforces Round #235 (Div. 2) | 1 | |
| 97 | Valera and X | Codeforces | Codeforces Round #237 (Div. 2) | 1 | |
| 98 | Gravity Flip | Codeforces | Codeforces Round #238 (Div. 2) | 1 | |
| 99 | Police Recruits | Codeforces | Codeforces Round #244 (Div. 2) | 1 | |
| 100 | Choosing Teams | Codeforces | Codeforces Round #246 (Div. 2) | 1 | |
| 101 | Black Square | Codeforces | Codeforces Round #247 (Div. 2) | 1 | |
| 102 | Queue on Bus Stop | Codeforces | Codeforces Round #249 (Div. 2) | 1 | |
| 103 | Devu, the Singer and Churu, the Joker | Codeforces | Codeforces Round #251 (Div. 2) | 1 | |
| 104 | Valera and Antique Items | Codeforces | Codeforces Round #252 (Div. 2) | 1 | |
| 105 | Anton and Letters | Codeforces | Codeforces Round #253 (Div. 2) | 1 | |
| 106 | DZY Loves Chessboard | Codeforces | Codeforces Round #254 (Div. 2) | 1 | |
| 107 | Rewards | Codeforces | Codeforces Round #256 (Div. 2) | 1 | |
| 108 | Jzzhu and Children | Codeforces | Codeforces Round #257 (Div. 2) | 1 | |
| 109 | Game With Sticks | Codeforces | Codeforces Round #258 (Div. 2) | 1 | |
| 110 | Little Pony and Crystal Mine | Codeforces | Codeforces Round #259 (Div. 2) | 1 | |
| 111 | Laptops | Codeforces | Codeforces Round #260 (Div. 2) | 1 | |
| 112 | Pashmak and Garden | Codeforces | Codeforces Round #261 (Div. 2) | 1 | |
| 113 | Vasya and Socks | Codeforces | Codeforces Round #262 (Div. 2) | 1 | |
| 114 | Appleman and Easy Task | Codeforces | Codeforces Round #263 (Div. 2) | 1 | |
| 115 | Caisa and Sugar | Codeforces | Codeforces Round #264 (Div. 2) | 1 | |
| 116 | inc ARG | Codeforces | Codeforces Round #265 (Div. 2) | 1 | |
| 117 | Cheap Travel | Codeforces | Codeforces Round #266 (Div. 2) | 1 | |
| 118 | George and Accommodation | Codeforces | Codeforces Round #267 (Div. 2) | 1 | |
| 119 | I Wanna Be the Guy | Codeforces | Codeforces Round #268 (Div. 2) | 1 | |
| 120 | MUH and Sticks | Codeforces | Codeforces Round #269 (Div. 2) | 1 | |
| 121 | Design Tutorial: Learn from Math | Codeforces | Codeforces Round #270 | 1 | |
| 122 | Keyboard | Codeforces | Codeforces Round #271 (Div. 2) | 1 | |
| 123 | Dreamoon and Stairs | Codeforces | Codeforces Round #272 (Div. 2) | 1 | |
| 124 | Initial Bet | Codeforces | Codeforces Round #273 (Div. 2) | 1 | |
| 125 | Expression | Codeforces | Codeforces Round #274 (Div. 2) | 1 | |
| 126 | Counterexample | Codeforces | Codeforces Round #275 (Div. 2) | 1 | |
| 127 | Calculating Function | Codeforces | Codeforces Round #277 (Div. 2) | 1 | |
| 128 | Giga Tower | Codeforces | Codeforces Round #278 (Div. 2) | 1 | |
| 129 | Team Olympiad | Codeforces | Codeforces Round #279 (Div. 2) | 1 | |
| 130 | Vanya and Cubes | Codeforces | Codeforces Round #280 (Div. 2) | 1 | |
| 131 | Minimum Difficulty | Codeforces | Codeforces Round #283 (Div. 2) | 1 | |
| 132 | Watching a movie | Codeforces | Codeforces Round #284 (Div. 2) | 1 | |
| 133 | Contest | Codeforces | Codeforces Round #285 (Div. 2) | 1 | |
| 134 | Amr and Music | Codeforces | Codeforces Round #287 (Div. 2) | 1 | |
| 135 | Maximum in Table | Codeforces | Codeforces Round #289 (Div. 2, ACM ICPC Rules) | 1 | |
| 136 | Fox And Snake | Codeforces | Codeforces Round #290 (Div. 2) | 1 | |
| 137 | Chewba?ca and Number | Codeforces | Codeforces Round #291 (Div. 2) | 1 | |
| 138 | Drazil and Date | Codeforces | Codeforces Round #292 (Div. 2) | 1 | |
| 139 | A and B and Chess | Codeforces | Codeforces Round #294 (Div. 2) | 1 | |
| 140 | Pangram | Codeforces | Codeforces Round #295 (Div. 2) | 1 | |
| 141 | Playing with Paper | Codeforces | Codeforces Round #296 (Div. 2) | 1 | |
| 142 | Vitaliy and Pie | Codeforces | Codeforces Round #297 (Div. 2) | 1 | |
| 143 | Exam | Codeforces | Codeforces Round #298 (Div. 2) | 1 | |
| 144 | Tavas and Nafas | Codeforces | Codeforces Round #299 (Div. 2) | 1 | |
| 145 | Combination Lock | Codeforces | Codeforces Round #301 (Div. 2) | 1 | |
| 146 | Toy Cars | Codeforces | Codeforces Round #303 (Div. 2) | 1 | |
| 147 | Soldier and Bananas | Codeforces | Codeforces Round #304 (Div. 2) | 1 | |
| 148 | Mike and Fax | Codeforces | Codeforces Round #305 (Div. 2) | 1 | |
| 149 | Two Substrings | Codeforces | Codeforces Round #306 (Div. 2) | 1 | |
| 150 | GukiZ and Contest | Codeforces | Codeforces Round #307 (Div. 2) | 1 | |
| 151 | Vanya and Table | Codeforces | Codeforces Round #308 (Div. 2) | 1 | |
| 152 | Kyoya and Photobooks | Codeforces | Codeforces Round #309 (Div. 2) | 1 | |
| 153 | Case of the Zeros and Ones | Codeforces | Codeforces Round #310 (Div. 2) | 1 | |
| 154 | Ilya and Diplomas | Codeforces | Codeforces Round #311 (Div. 2) | 1 | |
| 155 | Lala Land and Apple Trees | Codeforces | Codeforces Round #312 (Div. 2) | 1 | |
| 156 | Currency System in Geraldion | Codeforces | Codeforces Round #313 (Div. 2) | 1 | |
| 157 | Lineland Mail | Codeforces | Codeforces Round #Pi (Div. 2) | 1 | |
| 158 | Elections | Codeforces | Codeforces Round #316 (Div. 2) | 1 | |
| 159 | Arrays | Codeforces | Codeforces Round #317 [AimFund Thanks-Round] (Div. 2) | 1 | |
| 160 | Bear and Elections | Codeforces | Codeforces Round #318 [RussianCodeCup Thanks-Round] (Div. 2) | 1 | |
| 161 | Multiplication Table | Codeforces | Codeforces Round #319 (Div. 2) | 1 | |
| 162 | Raising Bacteria | Codeforces | Codeforces Round #320 (Div. 2) [Bayan Thanks-Round] | 1 | |
| 163 | Kefa and First Steps | Codeforces | Codeforces Round #321 (Div. 2) | 1 | |
| 164 | Vasya the Hipster | Codeforces | Codeforces Round #322 (Div. 2) | 1 | |
| 165 | Asphalting Roads | Codeforces | Codeforces Round #323 (Div. 2) | 1 | |
| 166 | Olesya and Rodion | Codeforces | Codeforces Round #324 (Div. 2) | 1 | |
| 167 | Alena's Schedule | Codeforces | Codeforces Round #325 (Div. 2) | 1 | |
| 168 | Duff and Meat | Codeforces | Codeforces Round #326 (Div. 2) | 1 | |
| 169 | Wizards' Duel | Codeforces | Codeforces Round #327 (Div. 2) | 1 | |
| 170 | Vitaly and Night | Codeforces | Codeforces Round #330 (Div. 2) | 1 | |
| 171 | Patrick and Shopping | Codeforces | Codeforces Round #332 (Div. 2) | 1 | |
| 172 | Two Bases | Codeforces | Codeforces Round #333 (Div. 2) | 1 | |
| 173 | Uncowed Forces | Codeforces | Codeforces Round #334 (Div. 2) | 1 | |
| 174 | Pasha and Stick | Codeforces | Codeforces Round #337 (Div. 2) | 1 | |
| 175 | Bulbs | Codeforces | Codeforces Round #338 (Div. 2) | 1 | |
| 176 | Elephant | Codeforces | Codeforces Round #340 (Div. 2) | 1 | |
| 177 | Wet Shark and Odd and Even | Codeforces | Codeforces Round #341 (Div. 2) | 1 | |
| 178 | Far Relative’s Birthday Cake | Codeforces | Codeforces Round #343 (Div. 2) | 1 | |
| 179 | Joysticks | Codeforces | Codeforces Round #345 (Div. 2) | 1 | |
| 180 | Round House | Codeforces | Codeforces Round #346 (Div. 2) | 1 | |
| 181 | Complicated GCD | Codeforces | Codeforces Round #347 (Div. 2) | 1 | |
| 182 | Holidays | Codeforces | Codeforces Round #350 (Div. 2) | 1 | |
| 183 | Summer Camp | Codeforces | Codeforces Round #352 (Div. 2) | 1 | |
| 184 | Infinite Sequence | Codeforces | Codeforces Round #353 (Div. 2) | 1 | |
| 185 | Nicholas and Permutation | Codeforces | Codeforces Round #354 (Div. 2) | 1 | |
| 186 | Vanya and Fence | Codeforces | Codeforces Round #355 (Div. 2) | 1 | |
| 187 | Bear and Five Cards | Codeforces | Codeforces Round #356 (Div. 2) | 1 | |
| 188 | A Good Contest | Codeforces | Codeforces Round #357 (Div. 2) | 1 | |
| 189 | Alyona and Numbers | Codeforces | Codeforces Round #358 (Div. 2) | 1 | |
| 190 | Free Ice Cream | Codeforces | Codeforces Round #359 (Div. 2) | 1 | |
| 191 | Opponents | Codeforces | Codeforces Round #360 (Div. 2) | 1 | |
| 192 | Pineapple Incident | Codeforces | Codeforces Round #362 (Div. 2) | 1 | |
| 193 | Launch of Collider | Codeforces | Codeforces Round #363 (Div. 2) | 1 | |
| 194 | Cards | Codeforces | Codeforces Round #364 (Div. 2) | 1 | |
| 195 | Mishka and Game | Codeforces | Codeforces Round #365 (Div. 2) | 1 | |
| 196 | Hulk | Codeforces | Codeforces Round #366 (Div. 2) | 1 | |
| 197 | Beru-taxi | Codeforces | Codeforces Round #367 (Div. 2) | 1 | |
| 198 | Brain's Photos | Codeforces | Codeforces Round #368 (Div. 2) | 1 | |
| 199 | Bus to Udayland | Codeforces | Codeforces Round #369 (Div. 2) | 1 | |
| 200 | Memory and Crow | Codeforces | Codeforces Round #370 (Div. 2) | 1 | |
| 201 | Meeting of Old Friends | Codeforces | Codeforces Round #371 (Div. 2) | 1 | |
| 202 | Crazy Computer | Codeforces | Codeforces Round #372 (Div. 2) | 1 | |
| 203 | Vitya in the Countryside | Codeforces | Codeforces Round #373 (Div. 2) | 1 | |
| 204 | One-dimensional Japanese Crossword | Codeforces | Codeforces Round #374 (Div. 2) | 1 | |
| 205 | The New Year: Meeting Friends | Codeforces | Codeforces Round #375 (Div. 2) | 1 | |
| 206 | Buy a Shovel | Codeforces | Codeforces Round #377 (Div. 2) | 1 | |
| 207 | Night at the Museum | Codeforces | Codeforces Round #376 (Div. 2) | 1 | |
| 208 | Grasshopper And the String | Codeforces | Codeforces Round #378 (Div. 2) | 1 | |
| 209 | Spreadsheet | Codeforces | Codeforces Beta Round #1 | 1 | |
| 210 | Anton and Danik | Codeforces | Codeforces Round #379 (Div. 2) | 1 | |
| 211 | Ostap and Grasshopper | Codeforces | Codeforces Round #382 (Div. 2) | 1 | |
| 212 | Arpa’s hard exam and Mehrdad’s naive cheat | Codeforces | Codeforces Round #383 (Div. 2) | 1 | |
| 213 | Balloons Colors | A2 Online Judge | 1 | ||
| 214 | Bachgold Problem | Codeforces | Codeforces Round #388 (Div. 2) | 1 | |
| 215 | Compote | Codeforces | Codeforces Round #386 (Div. 2) | 1 | |
| 216 | Hongcow Learns the Cyclic Shift | Codeforces | Codeforces Round #385 (Div. 2) | 1 | |
| 217 | Vladik and flights | Codeforces | Codeforces Round #384 (Div. 2) | 1 | |
| 218 | Primary Arithmetic | UVA | 1 | ||
| 219 | Gotta Catch Em' All! | Codeforces | Codecraft-17 and Codeforces Round #391 (Div. 1 + Div. 2, combined) | 1 | |
| 220 | Dasha and Stairs | Codeforces | Codeforces Round #394 (Div. 2) | 1 | |
| 221 | Holiday Of Equality | Codeforces | Codeforces Round #392 (Div. 2) | 1 | |
| 222 | Tetrahedron | Codeforces | Codeforces Round #113 (Div. 2) | 1 | |
| 223 | Mahmoud and Longest Uncommon Subsequence | Codeforces | Codeforces Round #396 (Div. 2) | 1 | |
| 224 | Taymyr is calling you | Codeforces | Codeforces Round #395 (Div. 2) | 1 | |
| 225 | Snacktower | Codeforces | Codeforces Round #398 (Div. 2) | 1 | |
| 226 | Oath of the Night's Watch | Codeforces | Divide by Zero 2017 and Codeforces Round #399 (Div. 1 + Div. 2, combined) | 1 | |
| 227 | A Serial Killer | Codeforces | ICM Technex 2017 and Codeforces Round #400 (Div. 1 + Div. 2, combined) | 1 | |
| 228 | Shell Game | Codeforces | Codeforces Round #401 (Div. 2) | 1 | |
| 229 | Pupils Redistribution | Codeforces | Codeforces Round #402 (Div. 2) | 1 | |
| 230 | Andryusha and Socks | Codeforces | ?????????? 2017 - ????? (?????? ??? ??????-??????????) | 1 | |
| 231 | Anton and Polyhedrons | Codeforces | Codeforces Round #404 (Div. 2) | 1 | |
| 232 | Bear and Big Brother | Codeforces | Codeforces Round #405 (rated, Div. 2, based on VK Cup 2017 Round 1) | 1 | |
| 233 | The Monster | Codeforces | Codeforces Round #406 (Div. 2) | 1 | |
| 234 | Anastasia and pebbles | Codeforces | Codeforces Round #407 (Div. 2) | 1 | |
| 235 | Buying A House | Codeforces | Codeforces Round #408 (Div. 2) | 1 | |
| 236 | Nth Smallest Value | A2 Online Judge | 1 | ||
| 237 | Vladik and Courtesy | Codeforces | Codeforces Round #416 (Div. 2) | 1 | |
| 238 | Fake NP | Codeforces | Codeforces Round #411 (Div. 2) | 1 | |
| 239 | Mike and palindrome | Codeforces | Codeforces Round #410 (Div. 2) | 1 | |
| 240 | Given Length and Sum of Digits... | Codeforces | Codeforces Round #277.5 (Div. 2) | 1 | |
| 241 | Generous Kefa | Codeforces | Codeforces Round #429 (Div. 2) | 1 | |
| 242 | Arya and Bran | Codeforces | Codeforces Round #428 (Div. 2) | 1 | |
| 243 | Key races | Codeforces | Codeforces Round #427 (Div. 2) | 1 | |
| 244 | The Useless Toy | Codeforces | Codeforces Round #426 (Div. 2) | 1 | |
| 245 | Sasha and Sticks | Codeforces | Codeforces Round #425 (Div. 2) | 1 | |
| 246 | Unimodal Array | Codeforces | Codeforces Round #424 (Div. 2, rated, based on VK Cup Finals) | 1 | |
| 247 | I'm bored with life | Codeforces | Codeforces Round #422 (Div. 2) | 1 | |
| 248 | Karen and Morning | Codeforces | Codeforces Round #419 (Div. 2) | 1 | |
| 249 | An abandoned sentiment from past | Codeforces | Codeforces Round #418 (Div. 2) | 1 | |
| 250 | Fair Game | Codeforces | Codeforces Round #436 (Div. 2) | 1 | |
| 251 | Prime Permutations | CodeChef | 1 | ||
| 252 | Trip For Meal | Codeforces | Codeforces Round #441 (Div. 2, by Moscow Team Olympiad) | 1 | |
| 253 | Search for Pretty Integers | Codeforces | Technocup 2018 - Elimination Round 2 | 1 | |
| 254 | The Artful Expedient | Codeforces | Codeforces Round #439 (Div. 2) | 1 | |
| 255 | Rounding | Codeforces | Codeforces Round #451 (Div. 2) | 1 | |
| 256 | Cloning Toys | Codeforces | Codeforces Round #461 (Div. 2) | 1 | |
| 257 | Jamie and Alarm Snooze | Codeforces | Codeforces Round #457 (Div. 2) | 1 | |
| 258 | Love Triangle | Codeforces | Codeforces Round #464 (Div. 2) | 1 | |
| 259 | Relational Operators | Live Archive | 2009 | Asia - Phuket | 1 |
| 260 | Tiling a Grid With Dominoes | Live Archive | 2007 | North America - Greater NY | 1 |
| 261 | Two Buttons | Codeforces | Codeforces Round #295 (Div. 2) | 1 | |
| 262 | Rare Order | UVA | 1 | ||
| 263 | Simple Game | Codeforces | Codeforces Round #316 (Div. 2) | 1 | |
| 264 | ACM (ACronymMaker) | SPOJ | 1 | ||
| 265 | Maximum Increase | Codeforces | Educational Codeforces Round 15 | 1 | |
| 266 | USB Flash Drives | Codeforces | Educational Codeforces Round 3 | 1 | |
| 267 | Heist | Codeforces | Codeforces Round #509 (Div. 2) | 1 | |
| 268 | Sum of Consecutive Prime Numbers | Live Archive | 2005 | Asia - Tokyo | 1 |
| 269 | Chat Servers Outgoing Traffic | Codeforces | Codeforces Beta Round #5 | 2 | |
| 270 | Flag | Codeforces | Codeforces Beta Round #16 (Div. 2 Only) | 2 | |
| 271 | Second Order Statistics | Codeforces | Codeforces Beta Round #22 (Div. 2 Only) | 2 | |
| 272 | Next Test | Codeforces | Codeforces Beta Round #27 (Codeforces format, Div. 2) | 2 | |
| 273 | Triangular numbers | Codeforces | Codeforces Beta Round #44 (Div. 2) | 2 | |
| 274 | Sinking Ship | Codeforces | Codeforces Beta Round #59 (Div. 2) | 2 | |
| 275 | Restoring Password | Codeforces | Codeforces Beta Round #76 (Div. 2 Only) | 2 | |
| 276 | Blackjack | Codeforces | Codeforces Beta Round #80 (Div. 2 Only) | 2 | |
| 277 | Palindromic Times | Codeforces | Codeforces Beta Round #83 (Div. 2 Only) | 2 | |
| 278 | Wasted Time | Codeforces | Codeforces Beta Round #93 (Div. 2 Only) | 2 | |
| 279 | Help Vasilisa the Wise 2 | Codeforces | Codeforces Round #102 (Div. 2) | 2 | |
| 280 | Game Outcome | Codeforces | Codeforces Round #110 (Div. 2) | 2 | |
| 281 | Rank List | Codeforces | Codeforces Round #113 (Div. 2) | 2 | |
| 282 | Wizards and Demonstration | Codeforces | Codeforces Round #114 (Div. 2) | 2 | |
| 283 | Comparing Strings | Codeforces | Codeforces Round #118 (Div. 2) | 2 | |
| 284 | Little Elephant and Rozdil | Codeforces | Codeforces Round #129 (Div. 2) | 2 | |
| 285 | Bicycle Chain | Codeforces | Codeforces Round #132 (Div. 2) | 2 | |
| 286 | Little Elephant and Function | Codeforces | Codeforces Round #136 (Div. 2) | 2 | |
| 287 | Shooshuns and Sequence | Codeforces | Codeforces Round #137 (Div. 2) | 2 | |
| 288 | Two Bags of Potatoes | Codeforces | Codeforces Round #148 (Div. 2) | 2 | |
| 289 | Buggy Sorting | Codeforces | Codeforces Round #151 (Div. 2) | 2 | |
| 290 | Cupboards | Codeforces | Codeforces Round #152 (Div. 2) | 2 | |
| 291 | Boys and Girls | Codeforces | Codeforces Round #154 (Div. 2) | 2 | |
| 292 | Little Elephant and Chess | Codeforces | Codeforces Round #157 (Div. 2) | 2 | |
| 293 | Adding Digits | Codeforces | Codeforces Round #158 (Div. 2) | 2 | |
| 294 | IQ Test | Codeforces | Codeforces Round #176 (Div. 2) | 2 | |
| 295 | Yaroslav and Permutations | Codeforces | Codeforces Round #179 (Div. 2) | 2 | |
| 296 | Eugeny and Array | Codeforces | Codeforces Round #182 (Div. 2) | 2 | |
| 297 | Ciel and Dancing | Codeforces | Codeforces Round #190 (Div. 2) | 2 | |
| 298 | Vasily the Bear and Triangle | Codeforces | Codeforces Round #195 (Div. 2) | 2 | |
| 299 | The Wall | Codeforces | Codeforces Round #198 (Div. 2) | 2 | |
| 300 | Xenia and Divisors | Codeforces | Codeforces Round #199 (Div. 2) | 2 | |
| 301 | Difference Row | Codeforces | Codeforces Round #201 (Div. 2) | 2 | |
| 302 | Vasya and Digital Root | Codeforces | Codeforces Round #206 (Div. 2) | 2 | |
| 303 | Group of Students | Codeforces | Codeforces Round #207 (Div. 2) | 2 | |
| 304 | Dima and Continuous Line | Codeforces | Codeforces Round #208 (Div. 2) | 2 | |
| 305 | Table | Codeforces | Codeforces Round #209 (Div. 2) | 2 | |
| 306 | Levko and Table | Codeforces | Codeforces Round #210 (Div. 2) | 2 | |
| 307 | Soroban | Codeforces | Codeforces Round #211 (Div. 2) | 2 | |
| 308 | Good Number | Codeforces | Codeforces Round #213 (Div. 2) | 2 | |
| 309 | Sereja and Coat Rack | Codeforces | Codeforces Round #215 (Div. 2) | 2 | |
| 310 | Collecting Beats is Fun | Codeforces | Codeforces Round #219 (Div. 2) | 2 | |
| 311 | Lever | Codeforces | Codeforces Round #221 (Div. 2) | 2 | |
| 312 | Ksenia and Pan Scales | Codeforces | Codeforces Round #224 (Div. 2) | 2 | |
| 313 | George and Sleep | Codeforces | Codeforces Round #227 (Div. 2) | 2 | |
| 314 | Inna and Choose Options | Codeforces | Codeforces Round #234 (Div. 2) | 2 | |
| 315 | Line to Cashier | Codeforces | Codeforces Round #239 (Div. 2) | 2 | |
| 316 | Mashmokh and Lights | Codeforces | Codeforces Round #240 (Div. 2) | 2 | |
| 317 | Squats | Codeforces | Codeforces Round #242 (Div. 2) | 2 | |
| 318 | Sereja and Mugs | Codeforces | Codeforces Round #243 (Div. 2) | 2 | |
| 319 | Kitahara Haruki's Gift | Codeforces | Codeforces Round #248 (Div. 2) | 2 | |
| 320 | The Child and Homework | Codeforces | Codeforces Round #250 (Div. 2) | 2 | |
| 321 | DZY Loves Hash | Codeforces | Codeforces Round #255 (Div. 2) | 2 | |
| 322 | Factory | Codeforces | Codeforces Round #276 (Div. 2) | 2 | |
| 323 | SwapSort | Codeforces | Codeforces Round #277.5 (Div. 2) | 2 | |
| 324 | Vasya and Football | Codeforces | Codeforces Round #281 (Div. 2) | 2 | |
| 325 | Digital Counter | Codeforces | Codeforces Round #282 (Div. 2) | 2 | |
| 326 | Mr. Kitayuta's Gift | Codeforces | Codeforces Round #286 (Div. 1) & Codeforces Round #286 (Div. 2) & Codeforces Round #286 (Div. 1) & Codeforces Round #286 (Div. 2) | 2 | |
| 327 | Pasha and Pixels | Codeforces | Codeforces Round #288 (Div. 2) | 2 | |
| 328 | Vitaly and Strings | Codeforces | Codeforces Round #293 (Div. 2) | 2 | |
| 329 | Cutting Banner | Codeforces | Codeforces Round #300 | 2 | |
| 330 | Set of Strings | Codeforces | Codeforces Round #302 (Div. 2) | 2 | |
| 331 | PawnChess | Codeforces | Codeforces Round #328 (Div. 2) | 2 | |
| 332 | 2Char | Codeforces | Codeforces Round #329 (Div. 2) | 2 | |
| 333 | Wilbur and Swimming Pool | Codeforces | Codeforces Round #331 (Div. 2) | 2 | |
| 334 | Magic Spheres | Codeforces | Codeforces Round #335 (Div. 2) | 2 | |
| 335 | Saitama Destroys Hotel | Codeforces | Codeforces Round #336 (Div. 2) | 2 | |
| 336 | Link/Cut Tree | Codeforces | Codeforces Round #339 (Div. 2) | 2 | |
| 337 | Interview | Codeforces | Codeforces Round #344 (Div. 2) | 2 | |
| 338 | Little Artem and Presents | Codeforces | Codeforces Round #348 (VK Cup 2016 Round 2, Div. 2 Edition) | 2 | |
| 339 | Pouring Rain | Codeforces | Codeforces Round #349 (Div. 2) | 2 | |
| 340 | Bear and Game | Codeforces | Codeforces Round #351 (VK Cup 2016 Round 3, Div. 2 Edition) | 2 | |
| 341 | Interview with Oleg | Codeforces | Technocup 2017 - Elimination Round 2 | 2 | |
| 342 | Alyona and copybooks | Codeforces | Codeforces Round #381 (Div. 2) | 2 | |
| 343 | Alyona and flowers | Codeforces | Codeforces Round #381 (Div. 2) | 2 | |
| 344 | Fenwick Trees | SPOJ | 2 | ||
| 345 | Display Size | Codeforces | Codeforces Round #387 (Div. 2) | 2 | |
| 346 | Santa Claus and a Place in a Class | Codeforces | Technocup 2017 - Elimination Round 3 | 2 | |
| 347 | Lesha and array splitting | Codeforces | Codeforces Round #390 (Div. 2) | 2 | |
| 348 | Petr and a calendar | Codeforces | Codeforces Round #393 (Div. 2) (8VC Venture Cup 2017 - Final Round Div. 2 Edition) | 2 | |
| 349 | Neverending competitions | Codeforces | Codeforces Round #397 by Kaspersky Lab and Barcelona Bootcamp (Div. 1 + Div. 2 combined) | 2 | |
| 350 | Sagheer and Crossroads | Codeforces | Codeforces Round #417 (Div. 2) | 2 | |
| 351 | Straight <<A>> | Codeforces | Codeforces Round #415 (Div. 2) | 2 | |
| 352 | Bank Robbery | Codeforces | Tinkoff Challenge - Final Round (Codeforces Round #414, rated, Div. 1 + Div. 2) | 2 | |
| 353 | Carrot Cakes | Codeforces | Playrix Codescapes Cup (Codeforces Round #413, rated, Div. 1 + Div. 2) | 2 | |
| 354 | Is it rated? | Codeforces | Codeforces Round #412 (rated, Div. 2, base on VK Cup 2017 Round 3) | 2 | |
| 355 | Vicious Keyboard | Codeforces | Codeforces Round #409 (rated, Div. 2, based on VK Cup 2017 Round 2) | 2 | |
| 356 | Chess Tourney | Codeforces | Educational Codeforces Round 27 | 2 | |
| 357 | Restaurant Tables | Codeforces | Codeforces Round #423 (Div. 2, rated, based on VK Cup Finals) | 2 | |
| 358 | Mister B and Book Reading | Codeforces | Codeforces Round #421 (Div. 2) | 2 | |
| 359 | Okabe and Future Gadget Laboratory | Codeforces | Codeforces Round #420 (Div. 2) | 2 | |
| 360 | Chores | Codeforces | Educational Codeforces Round 30 | 2 | |
| 361 | Bark to Unlock | Codeforces | Codeforces Round #438 by Sberbank and Barcelona Bootcamp (Div. 1 + Div. 2 combined) | 2 | |
| 362 | Chess For Three | Codeforces | Educational Codeforces Round 33 (Rated for Div. 2) | 2 | |
| 363 | Points on Line | Codeforces | Codeforces Round #153 (Div. 1) & Codeforces Round #153 (Div. 2) | 2 | |
| 364 | Book Replacement | Live Archive | 2005 | Asia - Tokyo | 2 |
| 365 | Kalevitch and Chess | Codeforces | Codeforces Beta Round #7 | 3 | |
| 366 | Increasing Sequence | Codeforces | Codeforces Beta Round #11 | 3 | |
| 367 | Super Agent | Codeforces | Codeforces Beta Round #12 (Div 2 Only) | 3 | |
| 368 | Numbers | Codeforces | Codeforces Beta Round #13 | 3 | |
| 369 | Letter | Codeforces | Codeforces Beta Round #14 (Div. 2) | 3 | |
| 370 | Noldbach problem | Codeforces | Codeforces Beta Round #17 | 3 | |
| 371 | Worms Evolution | Codeforces | Codeforces Beta Round #31 (Div. 2, Codeforces format) | 3 | |
| 372 | Reconnaissance | Codeforces | Codeforces Beta Round #32 (Div. 2, Codeforces format) | 3 | |
| 373 | Ball Game | Codeforces | School Personal Contest #2 (Winter Computer School 2010/11) - Codeforces Beta Round #43 (ACM-ICPC Rules) | 3 | |
| 374 | Sleuth | Codeforces | Codeforces Beta Round #46 (Div. 2) | 3 | |
| 375 | Bar | Codeforces | Codeforces Beta Round #52 (Div. 2) | 3 | |
| 376 | Petya and Java | Codeforces | Codeforces Beta Round #61 (Div. 2) | 3 | |
| 377 | Room Leader | Codeforces | Codeforces Beta Round #68 | 3 | |
| 378 | Haiku | Codeforces | Codeforces Beta Round #70 (Div. 2) | 3 | |
| 379 | Help Far Away Kingdom | Codeforces | Codeforces Beta Round #78 (Div. 2 Only) | 3 | |
| 380 | Card Game | Codeforces | Codeforces Beta Round #82 (Div. 2) | 3 | |
| 381 | Postcards and photos | Codeforces | Codeforces Beta Round #98 (Div. 2) | 3 | |
| 382 | New Year Table | Codeforces | Codeforces Round #100 | 3 | |
| 383 | Vasya and the Bus | Codeforces | Codeforces Round #120 (Div. 2) | 3 | |
| 384 | Funky Numbers | Codeforces | Codeforces Round #121 (Div. 2) | 3 | |
| 385 | Exams | Codeforces | Codeforces Round #122 (Div. 2) | 3 | |
| 386 | Let's Watch Football | Codeforces | Codeforces Round #123 (Div. 2) | 3 | |
| 387 | LLPS | Codeforces | Codeforces Round #127 (Div. 2) | 3 | |
| 388 | Two Problems | Codeforces | Codeforces Round #128 (Div. 2) | 3 | |
| 389 | Tiling with Hexagons | Codeforces | Codeforces Round #133 (Div. 2) | 3 | |
| 390 | Dice Tower | Codeforces | Codeforces Round #139 (Div. 2) | 3 | |
| 391 | Heads or Tails | Codeforces | Codeforces Round #149 (Div. 2) | 3 | |
| 392 | Dividing Orange | Codeforces | Codeforces Round #150 (Div. 2) | 3 | |
| 393 | Little Xor | Codeforces | Codeforces Round #153 (Div. 2) | 3 | |
| 394 | Cards with Numbers | Codeforces | Codeforces Round #155 (Div. 2) | 3 | |
| 395 | Sockets | Codeforces | Codeforces Round #159 (Div. 2) | 3 | |
| 396 | Point on Spiral | Codeforces | Codeforces Round #171 (Div. 2) | 3 | |
| 397 | Cows and Primitive Roots | Codeforces | Codeforces Round #174 (Div. 2) | 3 | |
| 398 | Polo the Penguin and Segments | Codeforces | Codeforces Round #177 (Div. 2) | 3 | |
| 399 | Snow Footprints | Codeforces | Codeforces Round #180 (Div. 2) | 3 | |
| 400 | Pythagorean Theorem II | Codeforces | Codeforces Round #183 (Div. 2) | 3 | |
| 401 | Whose sentence is it? | Codeforces | Codeforces Round #185 (Div. 2) | 3 | |
| 402 | Sereja and Bottles | Codeforces | Codeforces Round #187 (Div. 2) | 3 | |
| 403 | Down the Hatch! | Codeforces | Codeforces Round #193 (Div. 2) | 3 | |
| 404 | Dima and Guards | Codeforces | Codeforces Round #214 (Div. 2) | 3 | |
| 405 | Rook, Bishop and King | Codeforces | Codeforces Round #217 (Div. 2) | 3 | |
| 406 | K-Periodic Array | Codeforces | Codeforces Round #218 (Div. 2) | 3 | |
| 407 | Nuts | Codeforces | Codeforces Round #236 (Div. 2) | 3 | |
| 408 | Guess a number! | Codeforces | Codeforces Round #241 (Div. 2) | 3 | |
| 409 | Music | Codeforces | Codeforces Round #315 (Div. 2) | 3 | |
| 410 | Guest From the Past | Codeforces | Codeforces Round #342 (Div. 2) | 3 | |
| 411 | Mike and Cellphone | Codeforces | Codeforces Round #361 (Div. 2) | 3 | |
| 412 | Array | Codeforces | Codeforces Round #138 (Div. 2) | 3 | |
| 413 | The Map | SPOJ | 3 | ||
| 414 | Johnny and the Watermelon Plantation | SPOJ | 3 | ||
| 415 | Train and Peter | Codeforces | Codeforces Beta Round #8 | 4 | |
| 416 | Power Consumption Calculation | Codeforces | Codeforces Beta Round #10 | 4 | |
| 417 | Triangle | Codeforces | Codeforces Beta Round #18 (Div. 2 Only) | 4 | |
| 418 | BerOS file system | Codeforces | Codeforces Alpha Round #20 (Codeforces format) | 4 | |
| 419 | You're Given a String... | Codeforces | Codeforces Beta Round #23 | 4 | |
| 420 | Ring road | Codeforces | Codeforces Beta Round #24 | 4 | |
| 421 | Spit Problem | Codeforces | Codeforces Beta Round #29 (Div. 2, Codeforces format) | 4 | |
| 422 | Shell Game | Codeforces | Codeforces Beta Round #35 (Div. 2) | 4 | |
| 423 | Autocomplete | Codeforces | Codeforces Beta Round #49 (Div. 2) | 4 | |
| 424 | Where Are My Flakes? | Codeforces | Codeforces Beta Round #56 | 4 | |
| 425 | A Student's Dream | Codeforces | Codeforces Beta Round #58 | 4 | |
| 426 | Irrational problem | Codeforces | Codeforces Beta Round #62 | 4 | |
| 427 | Cookies | Codeforces | Codeforces Beta Round #64 | 4 | |
| 428 | Bus Game | Codeforces | Codeforces Beta Round #71 | 4 | |
| 429 | Chord | Codeforces | Codeforces Beta Round #73 (Div. 2 Only) | 4 | |
| 430 | Cableway | Codeforces | Codeforces Beta Round #74 (Div. 2 Only) | 4 | |
| 431 | Plate Game | Codeforces | Codeforces Round #124 (Div. 2) | 4 | |
| 432 | Mountain Scenery | Codeforces | Codeforces Round #134 (Div. 2) | 4 | |
| 433 | Where do I Turn? | Codeforces | Codeforces Round #140 (Div. 2) | 4 | |
| 434 | Lefthanders and Righthanders | Codeforces | Codeforces Round #145 (Div. 2, ACM-ICPC Rules) | 4 | |
| 435 | Strange Addition | Codeforces | Codeforces Round #184 (Div. 2) | 4 | |
| 436 | Two Semiknights Meet | Codeforces | Codeforces Round #212 (Div. 2) | 4 | |
| 437 | Nineteen | Codeforces | Codeforces Round #230 (Div. 2) | 4 | |
| 438 | K-Palindrome | A2 Online Judge | 4 | ||
| 439 | Binary Search | Live Archive | 2000 | Europe - Northeastern | 4 |
| 440 | Cottage Village | Codeforces | Codeforces Beta Round #15 | 5 | |
| 441 | World Football Cup | Codeforces | Codeforces Beta Round #19 | 5 | |
| 442 | Accounting | Codeforces | Codeforces Beta Round #30 (Codeforces format) | 5 | |
| 443 | What is for dinner? | Codeforces | Codeforces Beta Round #33 (Codeforces format) | 5 | |
| 444 | Extra-terrestrial Intelligence | Codeforces | Codeforces Beta Round #36 | 5 | |
| 445 | Find Color | Codeforces | Codeforces Beta Round #39 | 5 | |
| 446 | Guilty --- to the kitchen! | Codeforces | Codeforces Beta Round #41 | 5 | |
| 447 | Rock-paper-scissors | Codeforces | School Personal Contest #3 (Winter Computer School 2010/11) - Codeforces Beta Round #45 (ACM-ICPC Rules) | 5 | |
| 448 | Flea travel | Codeforces | Codeforces Beta Round #51 | 5 | |
| 449 | Square Earth? | Codeforces | Codeforces Beta Round #53 | 5 | |
| 450 | Clothes | Codeforces | Codeforces Beta Round #79 (Div. 2 Only) | 5 | |
| 451 | Elevator | Codeforces | Codeforces Beta Round #88 | 5 | |
| 452 | Robot Bicorn Attack | Codeforces | Codeforces Round #115 | 5 | |
| 453 | Inna and Pink Pony | Codeforces | Codeforces Round #220 (Div. 2) | 5 | |
| 454 | Inna and Alarm Clock | Codeforces | Codeforces Round #229 (Div. 2) | 5 | |
| 455 | Counting Sticks | Codeforces | Codeforces Round #231 (Div. 2) | 5 | |
| 456 | Pages | Codeforces | Codeforces Round #233 (Div. 2) | 5 | |
| 457 | Points and Segments (easy) | Codeforces | Codeforces Round #245 (Div. 2) | 5 | |
| 458 | April Fools' Problem (easy) | Codeforces | Helvetic Coding Contest 2017 online mirror (teams allowed, unrated) | 5 | |
| 459 | Chef and The Recursive Algorithm | CodeChef | 5 | ||
| 460 | Game with String | Codeforces | Codeforces Round #468 (Div. 1, based on Technocup 2018 Final Round) & Codeforces Round #468 (Div. 2, based on Technocup 2018 Final Round) | 5 | |
| 461 | InfiniteSequence | TopCoder | SRM 413 - Div2 hard] (13504) | 5 | |
| 462 | Cheaterius's Problem | Codeforces | Codeforces Beta Round #48 | 6 | |
| 463 | Presents | Codeforces | Codeforces Beta Round #50 | 6 | |
| 464 | Harry Potter and Three Spells | Codeforces | Codeforces Beta Round #60 | 6 | |
| 465 | The Elder Trolls IV: Oblivon | Codeforces | Codeforces Beta Round #66 | 6 | |
| 466 | Transmigration | Codeforces | Codeforces Beta Round #81 | 6 | |
| 467 | On Segment's Own Points | Codeforces | Codeforces Round #232 (Div. 2) | 6 | |
| 468 | Grasshopper | UVA | 6 | ||
| 469 | Jabber ID | Codeforces | Codeforces Alpha Round #21 (Codeforces format) | 7 | |
| 470 | Bender Problem | Codeforces | Codeforces Beta Round #28 (Codeforces format) | 7 | |
| 471 | Vasya and Types | Codeforces | Codeforces Beta Round #73 (Div. 1 Only) & Codeforces Beta Round #73 (Div. 2 Only) | 7 | |
| 472 | Defragmentation | Codeforces | Codeforces Round #116 (Div. 2, ACM-ICPC Rules) | 8 | |
| 473 | Cinema | Codeforces | Codeforces Round #126 (Div. 2) | 8 | |
| 474 | Amr and Math | SPOJ | 8 | ||
| 475 | Prefix Sums | Codeforces | Educational Codeforces Round 26 | 8 | |
| 476 | Watermelons | TJU | 8 | ||
| 477 | Battlefield | Codeforces | Codeforces Round #117 (Div. 2) | 9 | |
| 478 | bfs | SPOJ | 10 |