| Problem Name | Online Judge | Year | Contest | Difficulty Level | |
|---|---|---|---|---|---|
| 1 | Team | Codeforces | Codeforces Round #143 (Div. 2) | 1 | |
| 2 | System of Equations | Codeforces | Codeforces Round #131 (Div. 2) | 1 | |
| 3 | Hexadecimal's theorem | Codeforces | Codeforces Round #125 (Div. 2) | 1 | |
| 4 | Cut Ribbon | Codeforces | Codeforces Round #119 (Div. 2) | 1 | |
| 5 | I_love_\%username\% | Codeforces | Codeforces Round #109 (Div. 2) | 1 | |
| 6 | Lucky Division | Codeforces | Codeforces Beta Round #91 (Div. 2 Only) | 1 | |
| 7 | Lucky Sum of Digits | Codeforces | Codeforces Beta Round #84 (Div. 1 Only) & Codeforces Beta Round #84 (Div. 2 Only) | 1 | |
| 8 | IQ test | Codeforces | Codeforces Beta Round #25 (Div. 2 Only) | 1 | |
| 9 | Triangle | Codeforces | Codeforces Beta Round #6 (Div. 2 Only) | 1 | |
| 10 | Candy | SPOJ | 1 | ||
| 11 | Candy I | SPOJ | 1 | ||
| 12 | Grouping Problem | TJU | 1 | ||
| 13 | Play with Dates | SPOJ | 1 | ||
| 14 | Pangram | Codeforces | Codeforces Round #295 (Div. 2) | 1 | |
| 15 | Burger Time? | UVA | 1 | ||
| 16 | Amr and Pins | Codeforces | Codeforces Round #287 (Div. 2) | 1 | |
| 17 | Far Relative’s Birthday Cake | Codeforces | Codeforces Round #343 (Div. 2) | 1 | |
| 18 | Kefa and First Steps | Codeforces | Codeforces Round #321 (Div. 2) | 1 | |
| 19 | Gerald's Hexagon | Codeforces | Codeforces Round #313 (Div. 1) & Codeforces Round #313 (Div. 2) | 1 | |
| 20 | Lala Land and Apple Trees | Codeforces | Codeforces Round #312 (Div. 2) | 1 | |
| 21 | Kyoya and Photobooks | Codeforces | Codeforces Round #309 (Div. 2) | 1 | |
| 22 | Divisibility by Eight | Codeforces | Codeforces Round #306 (Div. 2) | 1 | |
| 23 | Preparing Olympiad | Codeforces | Codeforces Round #306 (Div. 2) | 1 | |
| 24 | Two Substrings | Codeforces | Codeforces Round #306 (Div. 2) | 1 | |
| 25 | Mike and Fax | Codeforces | Codeforces Round #305 (Div. 2) | 1 | |
| 26 | Soldier and Cards | Codeforces | Codeforces Round #304 (Div. 2) | 1 | |
| 27 | Soldier and Badges | Codeforces | Codeforces Round #304 (Div. 2) | 1 | |
| 28 | Tavas and SaDDas | Codeforces | Codeforces Round #299 (Div. 2) | 1 | |
| 29 | Han Solo and Lazer Gun | Codeforces | Codeforces Round #291 (Div. 2) | 1 | |
| 30 | Maximum in Table | Codeforces | Codeforces Round #289 (Div. 2, ACM ICPC Rules) | 1 | |
| 31 | Minimum Difficulty | Codeforces | Codeforces Round #283 (Div. 2) | 1 | |
| 32 | Giga Tower | Codeforces | Codeforces Round #278 (Div. 2) | 1 | |
| 33 | Counterexample | Codeforces | Codeforces Round #275 (Div. 2) | 1 | |
| 34 | Expression | Codeforces | Codeforces Round #274 (Div. 2) | 1 | |
| 35 | Dreamoon and WiFi | Codeforces | Codeforces Round #272 (Div. 2) | 1 | |
| 36 | Fedor and New Game | Codeforces | Codeforces Round #267 (Div. 2) | 1 | |
| 37 | Number of Ways | Codeforces | Codeforces Round #266 (Div. 2) | 1 | |
| 38 | Appleman and Easy Task | Codeforces | Codeforces Round #263 (Div. 2) | 1 | |
| 39 | Vasya and Socks | Codeforces | Codeforces Round #262 (Div. 2) | 1 | |
| 40 | Bear and Raspberry | Codeforces | Codeforces Round #226 (Div. 2) | 1 | |
| 41 | Playing with Dice | Codeforces | Codeforces Round #222 (Div. 2) | 1 | |
| 42 | Fence | Codeforces | Codeforces Round #211 (Div. 2) | 1 | |
| 43 | Jeff and Digits | Codeforces | Codeforces Round #204 (Div. 2) | 1 | |
| 44 | TL | Codeforces | Codeforces Round #203 (Div. 2) | 1 | |
| 45 | Cakeminator | Codeforces | Codeforces Round #192 (Div. 2) | 1 | |
| 46 | Flipping Game | Codeforces | Codeforces Round #191 (Div. 2) | 1 | |
| 47 | Magic Numbers | Codeforces | Codeforces Round #189 (Div. 2) | 1 | |
| 48 | Array | Codeforces | Codeforces Round #181 (Div. 2) | 1 | |
| 49 | Books | Codeforces | Codeforces Round #171 (Div. 2) | 1 | |
| 50 | Beautiful Year | Codeforces | Codeforces Round #166 (Div. 2) | 1 | |
| 51 | Games | Codeforces | Codeforces Round #164 (Div. 2) | 1 | |
| 52 | Parallelepiped | Codeforces | Codeforces Round #138 (Div. 2) | 1 | |
| 53 | Ice Skating | Codeforces | Codeforces Round #134 (Div. 1) & Codeforces Round #134 (Div. 2) | 1 | |
| 54 | Panoramix's Prediction | Codeforces | Codeforces Beta Round #69 (Div. 2 Only) | 1 | |
| 55 | Watermelon | Codeforces | Codeforces Beta Round #4 (Div. 2 Only) | 1 | |
| 56 | Bus to Udayland | Codeforces | Codeforces Round #369 (Div. 2) | 1 | |
| 57 | Taymyr is calling you | Codeforces | Codeforces Round #395 (Div. 2) | 1 | |
| 58 | Fraction | Codeforces | Codeforces Round #433 (Div. 2, based on Olympiad of Metropolises) | 1 | |
| 59 | QAQ | Codeforces | Codeforces Round #447 (Div. 2) | 1 | |
| 60 | Vladik and Courtesy | Codeforces | Codeforces Round #416 (Div. 2) | 1 | |
| 61 | Generous Kefa | Codeforces | Codeforces Round #429 (Div. 2) | 1 | |
| 62 | Mike and palindrome | Codeforces | Codeforces Round #410 (Div. 2) | 1 | |
| 63 | Beru-taxi | Codeforces | Codeforces Round #367 (Div. 2) | 1 | |
| 64 | Karen and Morning | Codeforces | Codeforces Round #419 (Div. 2) | 1 | |
| 65 | The Artful Expedient | Codeforces | Codeforces Round #439 (Div. 2) | 1 | |
| 66 | The Monster | Codeforces | Codeforces Round #406 (Div. 2) | 1 | |
| 67 | Arpa’s hard exam and Mehrdad’s naive cheat | Codeforces | Codeforces Round #383 (Div. 2) | 1 | |
| 68 | Little Elephant and Magic Square | Codeforces | Codeforces Round #157 (Div. 2) | 2 | |
| 69 | Shooshuns and Sequence | Codeforces | Codeforces Round #137 (Div. 2) | 2 | |
| 70 | Bicycle Chain | Codeforces | Codeforces Round #132 (Div. 2) | 2 | |
| 71 | Prizes, Prizes, more Prizes | Codeforces | Codeforces Round #130 (Div. 2) | 2 | |
| 72 | Little Elephant and Rozdil | Codeforces | Codeforces Round #129 (Div. 2) | 2 | |
| 73 | Ice Sculptures | Codeforces | VK Cup 2012 Qualification Round 1 | 2 | |
| 74 | Game Outcome | Codeforces | Codeforces Round #110 (Div. 2) | 2 | |
| 75 | Help Vasilisa the Wise 2 | Codeforces | Codeforces Round #102 (Div. 2) | 2 | |
| 76 | Lucky Substring | Codeforces | Codeforces Beta Round #91 (Div. 2 Only) | 2 | |
| 77 | Lucky Numbers (easy) | Codeforces | Codeforces Beta Round #77 (Div. 2 Only) | 2 | |
| 78 | Petya and Countryside | Codeforces | Codeforces Beta Round #61 (Div. 2) | 2 | |
| 79 | Triangular numbers | Codeforces | Codeforces Beta Round #44 (Div. 2) | 2 | |
| 80 | Second Order Statistics | Codeforces | Codeforces Beta Round #22 (Div. 2 Only) | 2 | |
| 81 | Hexadecimal's Numbers | Codeforces | Codeforces Beta Round #9 (Div. 2 Only) | 2 | |
| 82 | GRADE POINT AVERAGE | SPOJ | 2 | ||
| 83 | Dima and Continuous Line | Codeforces | Codeforces Round #208 (Div. 2) | 2 | |
| 84 | Bear and Three Balls | Codeforces | IndiaHacks 2016 - Online Edition (Div. 1 + Div. 2) | 2 | |
| 85 | Ebony and Ivory | Codeforces | Manthan, Codefest 16 | 2 | |
| 86 | Interview | Codeforces | Codeforces Round #344 (Div. 2) | 2 | |
| 87 | Far Relative’s Problem | Codeforces | Codeforces Round #343 (Div. 2) | 2 | |
| 88 | Robot Sequence | Codeforces | 8VC Venture Cup 2016 - Elimination Round | 2 | |
| 89 | Link/Cut Tree | Codeforces | Codeforces Round #339 (Div. 2) | 2 | |
| 90 | New Year and Old Property | Codeforces | Good Bye 2015 | 2 | |
| 91 | 2Char | Codeforces | Codeforces Round #329 (Div. 2) | 2 | |
| 92 | Bear and Three Musketeers | Codeforces | Codeforces Round #318 [RussianCodeCup Thanks-Round] (Div. 2) | 2 | |
| 93 | Case of Fake Numbers | Codeforces | Codeforces Round #310 (Div. 2) | 2 | |
| 94 | Ohana Cleans Up | Codeforces | Codeforces Round #309 (Div. 2) | 2 | |
| 95 | Mike and Fun | Codeforces | Codeforces Round #305 (Div. 2) | 2 | |
| 96 | Tourist's Notes | Codeforces | Codeforces Round #300 | 2 | |
| 97 | Cutting Banner | Codeforces | Codeforces Round #300 | 2 | |
| 98 | Drazil and His Happy Friends | Codeforces | Codeforces Round #292 (Div. 1) & Codeforces Round #292 (Div. 2) & Codeforces Round #292 (Div. 1) & Codeforces Round #292 (Div. 2) | 2 | |
| 99 | Pasha and Pixels | Codeforces | Codeforces Round #288 (Div. 2) | 2 | |
| 100 | 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 | |
| 101 | Removing Columns | Codeforces | Codeforces Round #283 (Div. 2) & Codeforces Round #283 (Div. 1) | 2 | |
| 102 | Hacking Cypher | Codeforces | Codeforces Round #279 (Div. 2) | 2 | |
| 103 | Valuable Resources | Codeforces | Codeforces Round #276 (Div. 2) | 2 | |
| 104 | Towers | Codeforces | Codeforces Round #274 (Div. 2) | 2 | |
| 105 | Strongly Connected City | Codeforces | Bayan 2015 Contest Warm Up | 2 | |
| 106 | Little Dima and Equation | Codeforces | Codeforces Round #262 (Div. 2) | 2 | |
| 107 | Multiplication Table | Codeforces | Codeforces Round #256 (Div. 2) | 2 | |
| 108 | Kitahara Haruki's Gift | Codeforces | Codeforces Round #248 (Div. 2) | 2 | |
| 109 | Football Kit | Codeforces | Codeforces Round #246 (Div. 2) | 2 | |
| 110 | Shower Line | Codeforces | Codeforces Round #247 (Div. 2) | 2 | |
| 111 | George and Round | Codeforces | Codeforces Round #227 (Div. 2) | 2 | |
| 112 | Bear and Strings | Codeforces | Codeforces Round #226 (Div. 2) | 2 | |
| 113 | Hamburgers | Codeforces | Codeforces Round #218 (Div. 2) | 2 | |
| 114 | Group of Students | Codeforces | Codeforces Round #207 (Div. 2) | 2 | |
| 115 | Simple Molecules | Codeforces | Codeforces Round #200 (Div. 2) | 2 | |
| 116 | Sail | Codeforces | Codeforces Round #180 (Div. 2) | 2 | |
| 117 | Polo the Penguin and Matrix | Codeforces | Codeforces Round #177 (Div. 2) | 2 | |
| 118 | IQ Test | Codeforces | Codeforces Round #176 (Div. 2) | 2 | |
| 119 | Prime Matrix | Codeforces | Codeforces Round #166 (Div. 2) | 2 | |
| 120 | Little Elephant and Chess | Codeforces | Codeforces Round #157 (Div. 2) | 2 | |
| 121 | Another Problem on Strings | Codeforces | Codeforces Round #112 (Div. 2) | 2 | |
| 122 | Mr. Kitayuta's Colorful Graph | Codeforces | Codeforces Round #286 (Div. 1) & Codeforces Round #286 (Div. 2) & Codeforces Round #286 (Div. 1) & Codeforces Round #286 (Div. 2) | 2 | |
| 123 | Economy Game | Codeforces | Codeforces Round #357 (Div. 2) | 2 | |
| 124 | Restoring Painting | Codeforces | Codeforces Round #353 (Div. 2) | 2 | |
| 125 | Thor | Codeforces | Codeforces Round #366 (Div. 1) & Codeforces Round #366 (Div. 2) | 2 | |
| 126 | Pride | Codeforces | Codeforces Round #446 (Div. 1) & Codeforces Round #446 (Div. 2) | 2 | |
| 127 | Mr. Kitayuta's Colorful Graph | Codeforces | Codeforces Round #286 (Div. 1) & Codeforces Round #286 (Div. 2) & Codeforces Round #286 (Div. 1) & Codeforces Round #286 (Div. 2) | 2 | |
| 128 | Vicious Keyboard | Codeforces | Codeforces Round #409 (rated, Div. 2, based on VK Cup 2017 Round 2) | 2 | |
| 129 | Ilya and tic-tac-toe game | Codeforces | Codeforces Round #390 (Div. 2) | 2 | |
| 130 | Parallelogram is Back | Codeforces | Codeforces Round #388 (Div. 2) | 2 | |
| 131 | Alyona and copybooks | Codeforces | Codeforces Round #381 (Div. 2) | 2 | |
| 132 | Okabe and Banana Trees | Codeforces | Codeforces Round #420 (Div. 2) | 2 | |
| 133 | Chtholly's request | Codeforces | Codeforces Round #449 (Div. 2) | 2 | |
| 134 | Pizza Separation | Codeforces | Codeforces Round #448 (Div. 2) | 2 | |
| 135 | Kirill And The Game | Codeforces | Codeforces Round #430 (Div. 2) | 2 | |
| 136 | Mike and strings | Codeforces | Codeforces Round #410 (Div. 2) | 2 | |
| 137 | Vladik and fractions | Codeforces | Codeforces Round #384 (Div. 2) | 2 | |
| 138 | Letters | Codeforces | Codeforces Round #481 (Div. 3) | 2 | |
| 139 | Little Xor | Codeforces | Codeforces Round #153 (Div. 2) | 3 | |
| 140 | Colorful Graph | Codeforces | Codeforces Round #151 (Div. 2) | 3 | |
| 141 | Heads or Tails | Codeforces | Codeforces Round #149 (Div. 2) | 3 | |
| 142 | Color Stripe | Codeforces | Codeforces Round #135 (Div. 2) | 3 | |
| 143 | Two Problems | Codeforces | Codeforces Round #128 (Div. 2) | 3 | |
| 144 | LLPS | Codeforces | Codeforces Round #127 (Div. 2) | 3 | |
| 145 | Let's Watch Football | Codeforces | Codeforces Round #123 (Div. 2) | 3 | |
| 146 | Funky Numbers | Codeforces | Codeforces Round #121 (Div. 2) | 3 | |
| 147 | Common Divisors | Codeforces | Codeforces Round #117 (Div. 2) | 3 | |
| 148 | Phone Code | Codeforces | Croc Champ 2012 - Qualification Round | 3 | |
| 149 | Dress'em in Vests! | Codeforces | VK Cup 2012 Round 1 | 3 | |
| 150 | Students and Shoelaces | Codeforces | Codeforces Beta Round #94 (Div. 2 Only) | 3 | |
| 151 | Ball Game | Codeforces | School Personal Contest #2 (Winter Computer School 2010/11) - Codeforces Beta Round #43 (ACM-ICPC Rules) | 3 | |
| 152 | Reconnaissance | Codeforces | Codeforces Beta Round #32 (Div. 2, Codeforces format) | 3 | |
| 153 | Noldbach problem | Codeforces | Codeforces Beta Round #17 | 3 | |
| 154 | Kalevitch and Chess | Codeforces | Codeforces Beta Round #7 | 3 | |
| 155 | Tic-tac-toe | Codeforces | Codeforces Beta Round #3 | 3 | |
| 156 | Catch Me If You Can | SPOJ | 3 | ||
| 157 | Polo the Penguin and Segments | Codeforces | Codeforces Round #177 (Div. 2) | 3 | |
| 158 | Point on Spiral | Codeforces | Codeforces Round #171 (Div. 2) | 3 | |
| 159 | Bear and Compressing | Codeforces | IndiaHacks 2016 - Online Edition (Div. 1 + Div. 2) | 3 | |
| 160 | A Trivial Problem | Codeforces | Manthan, Codefest 16 | 3 | |
| 161 | Block Towers | Codeforces | 8VC Venture Cup 2016 - Elimination Round | 3 | |
| 162 | The Text Splitting | Codeforces | Educational Codeforces Round 4 | 3 | |
| 163 | Gennady the Dentist | Codeforces | Codeforces Round #325 (Div. 1) & Codeforces Round #325 (Div. 2) | 3 | |
| 164 | Finding Team Member | Codeforces | Codeforces Round #320 (Div. 2) [Bayan Thanks-Round] | 3 | |
| 165 | "Or" Game | Codeforces | Codeforces Round #320 (Div. 1) [Bayan Thanks-Round] & Codeforces Round #320 (Div. 2) [Bayan Thanks-Round] | 3 | |
| 166 | Primes or Palindromes? | Codeforces | Codeforces Round #315 (Div. 1) & Codeforces Round #315 (Div. 2) | 3 | |
| 167 | Vanya and Scales | Codeforces | Codeforces Round #308 (Div. 2) | 3 | |
| 168 | King of Thieves | Codeforces | ZeptoLab Code Rush 2015 | 3 | |
| 169 | Permutations | Codeforces | Rockethon 2015 | 3 | |
| 170 | Secret Combination | Codeforces | Codeforces Round #283 (Div. 2) | 3 | |
| 171 | Vasya and Basketball | Codeforces | Codeforces Round #281 (Div. 2) | 3 | |
| 172 | Unbearable Controversy of Being | Codeforces | Codeforces Round #277.5 (Div. 2) | 3 | |
| 173 | Art Union | Codeforces | Codeforces Round #241 (Div. 2) | 3 | |
| 174 | A + B Strikes Back | Codeforces | April Fools Day Contest 2014 | 3 | |
| 175 | Triangle | Codeforces | Codeforces Round #239 (Div. 1) & Codeforces Round #239 (Div. 2) | 3 | |
| 176 | Searching for Graph | Codeforces | Codeforces Round #236 (Div. 2) & Codeforces Round #236 (Div. 1) | 3 | |
| 177 | Inna and New Matrix of Candies | Codeforces | Codeforces Round #234 (Div. 2) | 3 | |
| 178 | Bear and Prime Numbers | Codeforces | Codeforces Round #226 (Div. 2) | 3 | |
| 179 | Dima and To-do List | Codeforces | Codeforces Round #214 (Div. 2) | 3 | |
| 180 | Vasya and Robot | Codeforces | Codeforces Round #206 (Div. 1) & Codeforces Round #206 (Div. 2) | 3 | |
| 181 | Perfect Pair | Codeforces | Codeforces Round #188 (Div. 1) & Codeforces Round #188 (Div. 2) | 3 | |
| 182 | Sereja and Bottles | Codeforces | Codeforces Round #187 (Div. 2) | 3 | |
| 183 | Pythagorean Theorem II | Codeforces | Codeforces Round #183 (Div. 2) | 3 | |
| 184 | Coach | Codeforces | Codeforces Round #181 (Div. 2) | 3 | |
| 185 | Cows and Poker Game | Codeforces | Codeforces Round #174 (Div. 2) | 3 | |
| 186 | Non-square Equation | Codeforces | Codeforces Round #144 (Div. 2) | 3 | |
| 187 | Robbers' watch | Codeforces | Codeforces Round #359 (Div. 1) & Codeforces Round #359 (Div. 2) | 3 | |
| 188 | Sagheer, the Hausmeister | Codeforces | Codeforces Round #417 (Div. 2) | 3 | |
| 189 | Karen and Game | Codeforces | Codeforces Round #419 (Div. 1) & Codeforces Round #419 (Div. 2) | 3 | |
| 190 | Mike and Cellphone | Codeforces | Codeforces Round #361 (Div. 2) | 3 | |
| 191 | An impassioned circulation of affection | Codeforces | Codeforces Round #418 (Div. 2) | 3 | |
| 192 | Masha and geometric depression | Codeforces | Codeforces Round #407 (Div. 2) | 3 | |
| 193 | Mahmoud and a Message | Codeforces | Codeforces Round #396 (Div. 2) | 3 | |
| 194 | Almost Arithmetical Progression | Codeforces | Codeforces Round #156 (Div. 2) & Codeforces Round #156 (Div. 1) | 4 | |
| 195 | Undoubtedly Lucky Numbers | Codeforces | Codeforces Round #150 (Div. 2) | 4 | |
| 196 | Magic Box | Codeforces | Codeforces Round #143 (Div. 2) | 4 | |
| 197 | Shifts | Codeforces | Codeforces Round #142 (Div. 1) & Codeforces Round #142 (Div. 2) | 4 | |
| 198 | Two Tables | Codeforces | Codeforces Round #141 (Div. 2) | 4 | |
| 199 | Mountain Scenery | Codeforces | Codeforces Round #134 (Div. 2) | 4 | |
| 200 | Hometask | Codeforces | Codeforces Round #131 (Div. 2) | 4 | |
| 201 | Little Elephant and Sorting | Codeforces | Codeforces Round #129 (Div. 2) | 4 | |
| 202 | Walking in the Rain | Codeforces | Codeforces Round #121 (Div. 2) | 4 | |
| 203 | Counting Rhombi | Codeforces | Codeforces Round #119 (Div. 2) | 4 | |
| 204 | Letter | Codeforces | Codeforces Round #116 (Div. 2, ACM-ICPC Rules) | 4 | |
| 205 | String Manipulation 1.0 | Codeforces | VK Cup 2012 Qualification Round 2 | 4 | |
| 206 | Message | Codeforces | Codeforces Round #110 (Div. 1) & Codeforces Round #110 (Div. 2) | 4 | |
| 207 | Lucky Mask | Codeforces | Codeforces Round #104 (Div. 2) | 4 | |
| 208 | Elevator | Codeforces | School Regional Team Contest, Saratov, 2011 | 4 | |
| 209 | Choosing Laptop | Codeforces | Codeforces Beta Round #82 (Div. 2) | 4 | |
| 210 | Chord | Codeforces | Codeforces Beta Round #73 (Div. 2 Only) | 4 | |
| 211 | Fire Again | Codeforces | Codeforces Beta Round #35 (Div. 2) | 4 | |
| 212 | Spit Problem | Codeforces | Codeforces Beta Round #29 (Div. 2, Codeforces format) | 4 | |
| 213 | Tournament | Codeforces | Codeforces Beta Round #27 (Codeforces format, Div. 2) | 4 | |
| 214 | Roads not only in Berland | Codeforces | Codeforces Beta Round #25 (Div. 2 Only) | 4 | |
| 215 | You're Given a String... | Codeforces | Codeforces Beta Round #23 | 4 | |
| 216 | Triangle | Codeforces | Codeforces Beta Round #18 (Div. 2 Only) | 4 | |
| 217 | Running Student | Codeforces | Codeforces Beta Round #9 (Div. 2 Only) | 4 | |
| 218 | TWO BISHOPS | SPOJ | 4 | ||
| 219 | Minion Circle | CodeChef | 4 | ||
| 220 | Brute-force Algorithm | Live Archive | 2009 | Asia - Shanghai | 4 |
| 221 | Strange Addition | Codeforces | Codeforces Round #184 (Div. 2) | 4 | |
| 222 | Amity Assessment | Codeforces | CROC 2016 - Elimination Round | 4 | |
| 223 | Promocodes with Mistakes | Codeforces | VK Cup 2016 - Qualification Round 1 | 4 | |
| 224 | Orchestra | Codeforces | 8VC Venture Cup 2016 - Final Round (Div. 2 Edition) & 8VC Venture Cup 2016 - Final Round (Div. 1 Edition) | 4 | |
| 225 | Alice, Bob, Two Teams | Codeforces | Educational Codeforces Round 9 | 4 | |
| 226 | Spongebob and Squares | Codeforces | Codeforces Round #332 (Div. 2) | 4 | |
| 227 | Three Logos | Codeforces | Codeforces Round #322 (Div. 2) | 4 | |
| 228 | Amr and Chemistry | Codeforces | Codeforces Round #312 (Div. 2) | 4 | |
| 229 | Arthur and Table | Codeforces | Codeforces Round #311 (Div. 2) | 4 | |
| 230 | Vanya and Triangles | Codeforces | Codeforces Round #308 (Div. 2) | 4 | |
| 231 | ZgukistringZ | Codeforces | Codeforces Round #307 (Div. 2) | 4 | |
| 232 | Weird Chess | Codeforces | Codeforces Round #300 | 4 | |
| 233 | Fox And Jumping | Codeforces | Codeforces Round #290 (Div. 2) & Codeforces Round #290 (Div. 1) | 4 | |
| 234 | Fight the Monster | Codeforces | Codeforces Round #278 (Div. 1) & Codeforces Round #278 (Div. 2) | 4 | |
| 235 | Captain Marmot | Codeforces | Codeforces Round #271 (Div. 2) | 4 | |
| 236 | MUH and House of Cards | Codeforces | Codeforces Round #269 (Div. 2) | 4 | |
| 237 | Wonder Room | Codeforces | Codeforces Round #266 (Div. 2) | 4 | |
| 238 | Little Pony and Harmony Chest | Codeforces | Codeforces Round #259 (Div. 1) & Codeforces Round #259 (Div. 2) | 4 | |
| 239 | Predict Outcome of the Game | Codeforces | Codeforces Round #258 (Div. 2) | 4 | |
| 240 | DZY Loves Modification | Codeforces | Codeforces Round #255 (Div. 1) & Codeforces Round #255 (Div. 2) | 4 | |
| 241 | Kolya and Tandem Repeat | Codeforces | Codeforces Round #253 (Div. 2) | 4 | |
| 242 | Devu and Partitioning of the Array | Codeforces | Codeforces Round #251 (Div. 2) | 4 | |
| 243 | Balls Game | Codeforces | Codeforces Round #245 (Div. 2) | 4 | |
| 244 | Sereja and Swaps | Codeforces | Codeforces Round #243 (Div. 1) & Codeforces Round #243 (Div. 2) | 4 | |
| 245 | Trees in a Row | Codeforces | Codeforces Round #236 (Div. 2) | 4 | |
| 246 | Sereja and Prefixes | Codeforces | Codeforces Round #223 (Div. 1) & Codeforces Round #223 (Div. 2) | 4 | |
| 247 | Pair of Numbers | Codeforces | Codeforces Round #209 (Div. 2) | 4 | |
| 248 | Dima and Text Messages | Codeforces | Codeforces Round #208 (Div. 2) | 4 | |
| 249 | Resort | Codeforces | Codeforces Round #203 (Div. 2) | 4 | |
| 250 | Xenia and Spies | Codeforces | Codeforces Round #199 (Div. 2) | 4 | |
| 251 | Beautiful Numbers | Codeforces | Codeforces Round #181 (Div. 2) | 4 | |
| 252 | Ksusha and Array | Codeforces | Croc Champ 2013 - Round 2 (Div. 2 Edition) | 4 | |
| 253 | New Problem | Codeforces | Codeforces Round #170 (Div. 2) | 4 | |
| 254 | Ancient Prophesy | Codeforces | Codeforces Round #158 (Div. 2) | 4 | |
| 255 | View Angle | Codeforces | Codeforces Round #159 (Div. 2) | 4 | |
| 256 | Palindrome pairs | Codeforces | VK Cup 2012 Qualification Round 2 | 4 | |
| 257 | Tennis Game | Codeforces | Codeforces Round #283 (Div. 2) & Codeforces Round #283 (Div. 1) | 4 | |
| 258 | 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 | |
| 259 | Tell Your World | Codeforces | Codeforces Round #431 (Div. 2) | 4 | |
| 260 | Remove Extra One | Codeforces | Codeforces Round #450 (Div. 2) | 4 | |
| 261 | Game of the Rows | Codeforces | Codeforces Round #428 (Div. 2) | 4 | |
| 262 | Jury Size | Codeforces | Codeforces Round #155 (Div. 2) | 5 | |
| 263 | Beauty Pageant | Codeforces | Codeforces Round #151 (Div. 2) | 5 | |
| 264 | Game on Paper | Codeforces | Codeforces Round #128 (Div. 2) | 5 | |
| 265 | Series of Crimes | Codeforces | Croc Champ 2012 - Round 2 (Unofficial Div. 2 Edition) | 5 | |
| 266 | Robot Bicorn Attack | Codeforces | Codeforces Round #115 | 5 | |
| 267 | Broken checker | Codeforces | April Fools Day Contest | 5 | |
| 268 | Compatible Numbers | Codeforces | Codeforces Round #112 (Div. 2) | 5 | |
| 269 | Help Farmer | Codeforces | Codeforces Round #102 (Div. 1) & Codeforces Round #102 (Div. 2) | 5 | |
| 270 | Rectangle and Square | Codeforces | Codeforces Beta Round #97 (Div. 1) & Codeforces Beta Round #97 (Div. 2) | 5 | |
| 271 | Permutations | Codeforces | Codeforces Beta Round #92 (Div. 2 Only) | 5 | |
| 272 | Three Sons | Codeforces | School Regional Team Contest, Saratov, 2011 | 5 | |
| 273 | Fancy Number | Codeforces | Codeforces Beta Round #89 (Div. 2) | 5 | |
| 274 | PFAST Inc. | Codeforces | Codeforces Beta Round #86 (Div. 2 Only) | 5 | |
| 275 | Clothes | Codeforces | Codeforces Beta Round #79 (Div. 2 Only) | 5 | |
| 276 | Petya and His Friends | Codeforces | Codeforces Beta Round #61 (Div. 2) | 5 | |
| 277 | Martian Dollar | Codeforces | Codeforces Beta Round #40 (Div. 2) | 5 | |
| 278 | Chess | Codeforces | School Personal Contest #1 (Winter Computer School 2010/11) - Codeforces Beta Round #38 (ACM-ICPC Rules) | 5 | |
| 279 | Accounting | Codeforces | Codeforces Beta Round #30 (Codeforces format) | 5 | |
| 280 | Number With The Given Amount Of Divisors | Codeforces | Codeforces Beta Round #27 (Codeforces format, Div. 2) | 5 | |
| 281 | Bargaining Table | Codeforces | Codeforces Beta Round #22 (Div. 2 Only) | 5 | |
| 282 | Four Segments | Codeforces | Codeforces Beta Round #14 (Div. 2) | 5 | |
| 283 | Brute-force Algorithm EXTREME | SPOJ | 5 | ||
| 284 | 4-point polyline | Codeforces | MemSQL Start[c]UP 2.0 - Round 1 | 5 | |
| 285 | Restore Cube | Codeforces | Codeforces Round #265 (Div. 1) | 5 | |
| 286 | Shopping | Codeforces | Educational Codeforces Round 12 | 5 | |
| 287 | Fibonacci-ish | Codeforces | Manthan, Codefest 16 | 5 | |
| 288 | Jerry's Protest | Codeforces | 8VC Venture Cup 2016 - Elimination Round | 5 | |
| 289 | Skills | Codeforces | Codeforces Round #339 (Div. 1) & Codeforces Round #339 (Div. 2) | 5 | |
| 290 | Chocolate Bar | Codeforces | Educational Codeforces Round 1 | 5 | |
| 291 | Boulevard | Codeforces | 2015-2016 ACM-ICPC, NEERC, Southern Subregional Contest (Online Mirror, ACM-ICPC Rules, Teams Preferred) | 5 | |
| 292 | Mike and Frog | Codeforces | Codeforces Round #305 (Div. 1) & Codeforces Round #305 (Div. 2) | 5 | |
| 293 | Om Nom and Candies | Codeforces | ZeptoLab Code Rush 2015 | 5 | |
| 294 | Inversions problem | Codeforces | Rockethon 2015 | 5 | |
| 295 | Chocolate | Codeforces | Codeforces Round #279 (Div. 2) | 5 | |
| 296 | Candy Boxes | Codeforces | Codeforces Round #278 (Div. 2) | 5 | |
| 297 | CGCDSSQ | Codeforces | Bayan 2015 Contest Warm Up | 5 | |
| 298 | Borya and Hanabi | Codeforces | Codeforces Round #253 (Div. 1) & Codeforces Round #253 (Div. 2) | 5 | |
| 299 | Roman and Numbers | Codeforces | Codeforces Round #235 (Div. 2) | 5 | |
| 300 | Counting Rectangles is Fun | Codeforces | Codeforces Round #219 (Div. 1) & Codeforces Round #219 (Div. 2) | 5 | |
| 301 | Vasya and Beautiful Arrays | Codeforces | Codeforces Round #206 (Div. 1) & Codeforces Round #206 (Div. 2) | 5 | |
| 302 | Vasily the Bear and Sequence | Codeforces | Codeforces Round #195 (Div. 2) | 5 | |
| 303 | Continued Fractions | Codeforces | Codeforces Round #184 (Div. 2) | 5 | |
| 304 | Calendar | Codeforces | Codeforces Round #183 (Div. 2) | 5 | |
| 305 | Ksusha the Squirrel | Codeforces | Croc Champ 2013 - Round 2 (Div. 2 Edition) | 5 | |
| 306 | Network Mask | Codeforces | Croc Champ 2013 - Qualification Round | 5 | |
| 307 | Nearest Fraction | Codeforces | Codeforces Round #172 (Div. 2) | 5 | |
| 308 | Average Numbers | Codeforces | Codeforces Testing Round #3 | 5 | |
| 309 | Petr# | Codeforces | Codeforces Beta Round #86 (Div. 1 Only) & Codeforces Beta Round #86 (Div. 2 Only) | 5 | |
| 310 | Bitwise Formula | Codeforces | Codeforces Round #402 (Div. 1) & Codeforces Round #402 (Div. 2) | 5 | |
| 311 | Hanoi Factory | Codeforces | Codeforces Round #401 (Div. 2) | 5 | |
| 312 | The Queue | Codeforces | Codeforces Round #398 (Div. 2) | 5 | |
| 313 | Little Elephant and LCM | Codeforces | Codeforces Round #157 (Div. 1) & Codeforces Round #157 (Div. 2) | 6 | |
| 314 | Little Elephant and Elections | Codeforces | Codeforces Round #157 (Div. 1) & Codeforces Round #157 (Div. 2) | 6 | |
| 315 | Mr. Bender and Square | Codeforces | Codeforces Round #156 (Div. 2) & Codeforces Round #156 (Div. 1) | 6 | |
| 316 | Unsorting Array | Codeforces | Codeforces Round #153 (Div. 2) | 6 | |
| 317 | Easy Tape Programming | Codeforces | Codeforces Round #148 (Div. 2) | 6 | |
| 318 | Number of Triplets | Codeforces | Croc Champ 2012 - Round 2 (Unofficial Div. 2 Edition) | 6 | |
| 319 | Party | Codeforces | ABBYY Cup 2.0 - Easy | 6 | |
| 320 | New Year Cards | Codeforces | Codeforces Round #100 | 6 | |
| 321 | String | Codeforces | Codeforces Beta Round #94 (Div. 1 Only) & Codeforces Beta Round #94 (Div. 2 Only) | 6 | |
| 322 | Hot Bath | Codeforces | Codeforces Beta Round #93 (Div. 1 Only) & Codeforces Beta Round #93 (Div. 2 Only) | 6 | |
| 323 | Lucky Permutation | Codeforces | Codeforces Beta Round #91 (Div. 1 Only) & Codeforces Beta Round #91 (Div. 2 Only) | 6 | |
| 324 | Very Interesting Game | Codeforces | Codeforces Beta Round #88 | 6 | |
| 325 | Lucky Probability | Codeforces | Codeforces Beta Round #84 (Div. 1 Only) & Codeforces Beta Round #84 (Div. 2 Only) | 6 | |
| 326 | Time to Raid Cowavans | Codeforces | Codeforces Beta Round #80 (Div. 1 Only) & Codeforces Beta Round #80 (Div. 2 Only) | 6 | |
| 327 | Sum of Medians | Codeforces | Yandex.Algorithm 2011 Round 1 | 6 | |
| 328 | Heroes | Codeforces | Codeforces Beta Round #69 (Div. 1 Only) & Codeforces Beta Round #69 (Div. 2 Only) | 6 | |
| 329 | Harry Potter and the History of Magic | Codeforces | Codeforces Beta Round #60 | 6 | |
| 330 | Trees | Codeforces | Codeforces Beta Round #54 (Div. 2) | 6 | |
| 331 | Smallest number | Codeforces | Codeforces Beta Round #51 | 6 | |
| 332 | Land Lot | Codeforces | School Personal Contest #3 (Winter Computer School 2010/11) - Codeforces Beta Round #45 (ACM-ICPC Rules) | 6 | |
| 333 | Blinds | Codeforces | School Personal Contest #1 (Winter Computer School 2010/11) - Codeforces Beta Round #38 (ACM-ICPC Rules) | 6 | |
| 334 | Wonderful Randomized Sum | Codeforces | Codeforces Beta Round #33 (Codeforces format) | 6 | |
| 335 | Lizards and Basements 2 | Codeforces | Codeforces Beta Round #6 (Div. 2 Only) | 6 | |
| 336 | Kingdoms | UVA | 6 | ||
| 337 | FLING1 | SPOJ | 6 | ||
| 338 | Bear and Up-Down | Codeforces | IndiaHacks 2016 - Online Edition (Div. 1 + Div. 2) | 6 | |
| 339 | Longest Subsequence | Codeforces | Educational Codeforces Round 9 | 6 | |
| 340 | Vanya and Brackets | Codeforces | Codeforces Round #308 (Div. 2) | 6 | |
| 341 | A Heap of Heaps | Codeforces | Codeforces Round #300 | 6 | |
| 342 | Anya and Cubes | Codeforces | Codeforces Round #297 (Div. 2) | 6 | |
| 343 | Restoring Increasing Sequence | Codeforces | Codeforces Round #279 (Div. 2) | 6 | |
| 344 | Caisa and Tree | Codeforces | Codeforces Round #264 (Div. 2) | 6 | |
| 345 | Divisors | Codeforces | Codeforces Round #256 (Div. 2) | 6 | |
| 346 | Fly, freebies, fly! | Codeforces | Testing Round #9 | 6 | |
| 347 | New Year Letter | Codeforces | Good Bye 2013 | 6 | |
| 348 | Maximal Area Quadrilateral | Codeforces | Codeforces Round #198 (Div. 2) | 6 | |
| 349 | Characteristics of Rectangles | Codeforces | Codeforces Round #194 (Div. 1) | 6 | |
| 350 | Oh Sweet Beaverette | Codeforces | ABBYY Cup 3.0 - Finals (online version) | 6 | |
| 351 | Ants | Codeforces | Codeforces Round #188 (Div. 1) & Codeforces Round #188 (Div. 2) | 6 | |
| 352 | Summer Homework | Codeforces | ABBYY Cup 3.0 | 6 | |
| 353 | EKG | Codeforces | ABBYY Cup 3.0 | 6 | |
| 354 | Encrypting Messages | Codeforces | ABBYY Cup 2.0 - Easy | 6 | |
| 355 | Bulls and Cows | Codeforces | Codeforces Beta Round #59 (Div. 2) | 6 | |
| 356 | Platforms | Codeforces | Codeforces Beta Round #18 (Div. 2 Only) | 6 | |
| 357 | Karen and Test | Codeforces | Codeforces Round #419 (Div. 1) & Codeforces Round #419 (Div. 2) | 6 | |
| 358 | Karen and Supermarket | Codeforces | Codeforces Round #419 (Div. 1) & Codeforces Round #419 (Div. 2) | 6 | |
| 359 | Vladik and cards | Codeforces | Codeforces Round #384 (Div. 2) | 6 | |
| 360 | Table with Letters - 2 | Codeforces | Codeforces Round #154 (Div. 2) | 7 | |
| 361 | Blackboard Fibonacci | Codeforces | Codeforces Round #134 (Div. 1) & Codeforces Round #134 (Div. 2) | 7 | |
| 362 | Brand New Easy Problem | Codeforces | Codeforces Round #127 (Div. 2) | 7 | |
| 363 | Football Championship | Codeforces | Codeforces Round #126 (Div. 2) | 7 | |
| 364 | Xor | Codeforces | Codeforces Round #122 (Div. 1) & Codeforces Round #122 (Div. 2) | 7 | |
| 365 | Spiral Maximum | Codeforces | Croc Champ 2012 - Round 1 | 7 | |
| 366 | Pairs of Numbers | Codeforces | Codeforces Testing Round #3 | 7 | |
| 367 | Double Happiness | Codeforces | Codeforces Beta Round #86 (Div. 1 Only) & Codeforces Beta Round #86 (Div. 2 Only) | 7 | |
| 368 | Treasure Island | Codeforces | Codeforces Beta Round #82 (Div. 2) | 7 | |
| 369 | Dark Assembly | Codeforces | Codeforces Beta Round #81 | 7 | |
| 370 | Help Victoria the Wise | Codeforces | Codeforces Beta Round #78 (Div. 1 Only) & Codeforces Beta Round #78 (Div. 2 Only) | 7 | |
| 371 | Journey | Codeforces | Codeforces Beta Round #42 (Div. 2) | 7 | |
| 372 | THE N WITTY FRIENDS | SPOJ | 7 | ||
| 373 | Binary Table | Codeforces | CROC 2016 - Final Round [Private, For Onsite Finalists Only] | 7 | |
| 374 | Three-dimensional Turtle Super Computer | Codeforces | VK Cup 2016 - Qualification Round 2 | 7 | |
| 375 | Rat Kwesh and Cheese | Codeforces | Codeforces Round #341 (Div. 2) | 7 | |
| 376 | Edo and Magnets | Codeforces | Codeforces Round #330 (Div. 1) & Codeforces Round #330 (Div. 2) | 7 | |
| 377 | Group Photo 2 (online mirror version) | Codeforces | VK Cup 2015 - Round 1 (unofficial online mirror, Div. 1 only) | 7 | |
| 378 | Fuzzy Search | Codeforces | Codeforces Round #296 (Div. 1) | 7 | |
| 379 | Kamal-ol-molk's Painting | Codeforces | Bayan 2015 Contest Warm Up | 7 | |
| 380 | Little Victor and Set | Codeforces | Codeforces Round #262 (Div. 2) | 7 | |
| 381 | Elections | Codeforces | MemSQL Start[c]UP 2.0 - Round 2 | 7 | |
| 382 | Special Grid | Codeforces | Codeforces Round #249 (Div. 2) | 7 | |
| 383 | Curious Array | Codeforces | Codeforces Round #239 (Div. 1) & Codeforces Round #239 (Div. 2) | 7 | |
| 384 | Wrong Floyd | Codeforces | Codeforces Round #203 (Div. 2) | 7 | |
| 385 | Subset Sums | Codeforces | Codeforces Round #202 (Div. 1) & Codeforces Round #202 (Div. 2) | 7 | |
| 386 | Divisor Tree | Codeforces | Codeforces Round #196 (Div. 2) & Codeforces Round #196 (Div. 1) | 7 | |
| 387 | Minimum Modular | Codeforces | Codeforces Round #183 (Div. 1) & Codeforces Round #183 (Div. 2) | 7 | |
| 388 | Beautiful IP Addresses | Codeforces | Croc Champ 2013 - Round 1 | 7 | |
| 389 | Log Stream Analysis | Codeforces | CROC-MBTU 2012, Elimination Round (ACM-ICPC) | 7 | |
| 390 | Programming Language | Codeforces | Codeforces Round #126 (Div. 2) | 7 | |
| 391 | ucyhf | Codeforces | April Fools Day Contest | 7 | |
| 392 | Game | Codeforces | Codeforces Beta Round #46 (Div. 2) | 7 | |
| 393 | Seller Bob | Codeforces | Codeforces Beta Round #18 (Div. 2 Only) | 7 | |
| 394 | Hongcow Buys a Deck of Cards | Codeforces | Codeforces Round #385 (Div. 1) & Codeforces Round #385 (Div. 2) | 7 | |
| 395 | Bamboo Partition | Codeforces | Codeforces Round #424 (Div. 1, rated, based on VK Cup Finals) & Codeforces Round #424 (Div. 2, rated, based on VK Cup Finals) | 7 | |
| 396 | Peterson Polyglot | Codeforces | Codeforces Round #402 (Div. 1) & Codeforces Round #402 (Div. 2) | 7 | |
| 397 | Vladik and chat | Codeforces | Codeforces Round #390 (Div. 2) | 7 | |
| 398 | Anton and Permutation | Codeforces | Codeforces Round #404 (Div. 2) | 7 | |
| 399 | Mad Joe | Codeforces | CROC-MBTU 2012, Final Round (Online version, Div. 2) | 8 | |
| 400 | Suggested Friends | Codeforces | CROC-MBTU 2012, Elimination Round (ACM-ICPC) | 8 | |
| 401 | Crosses | Codeforces | Codeforces Round #132 (Div. 2) | 8 | |
| 402 | Cinema | Codeforces | Codeforces Round #126 (Div. 2) | 8 | |
| 403 | Zoo | Codeforces | Croc Champ 2012 - Final | 8 | |
| 404 | Polycarpus the Safecracker | Codeforces | VK Cup 2012 Round 1 | 8 | |
| 405 | Help Caretaker | Codeforces | Codeforces Round #102 (Div. 1) & Codeforces Round #102 (Div. 2) | 8 | |
| 406 | Chip Play | Codeforces | Codeforces Beta Round #74 (Div. 1 Only) & Codeforces Beta Round #74 (Div. 2 Only) | 8 | |
| 407 | Mushroom Strife | Codeforces | Codeforces Beta Round #56 | 8 | |
| 408 | Safe | Codeforces | Codeforces Beta Round #44 (Div. 2) | 8 | |
| 409 | Safe cracking | Codeforces | Codeforces Beta Round #41 | 8 | |
| 410 | Collisions | Codeforces | Codeforces Beta Round #34 (Div. 2) | 8 | |
| 411 | Sereja and Tree | Codeforces | Codeforces Round #223 (Div. 1) & Codeforces Round #223 (Div. 2) | 8 | |
| 412 | The Diameter of Tree | Live Archive | 2014 | Asia - Xian | 8 |
| 413 | Magic Matrix | Codeforces | Educational Codeforces Round 9 | 8 | |
| 414 | Biathlon Track | Codeforces | Codeforces Round #242 (Div. 2) | 8 | |
| 415 | Broken Monitor | Codeforces | Codeforces Round #217 (Div. 2) | 8 | |
| 416 | Dima and Magic Guitar | Codeforces | Codeforces Round #214 (Div. 2) | 8 | |
| 417 | Ghd | Codeforces | Codeforces Round #213 (Div. 1) | 8 | |
| 418 | Beautiful Set | Codeforces | Codeforces Round #213 (Div. 1) & Codeforces Round #213 (Div. 2) | 8 | |
| 419 | Summer Earnings | Codeforces | Codeforces Round #194 (Div. 1) | 8 | |
| 420 | Cube Problem | Codeforces | Croc Champ 2013 - Round 2 | 8 | |
| 421 | Distinct Paths | Codeforces | Croc Champ 2013 - Round 2 | 8 | |
| 422 | Vanya and Balloons | Codeforces | Codeforces Round #355 (Div. 2) | 8 | |
| 423 | Dividing Kingdom II | Codeforces | Codeforces Round #360 (Div. 1) | 8 | |
| 424 | Kay and Eternity | Codeforces | Codeforces Round #359 (Div. 1) | 8 | |
| 425 | Timofey and remoduling | Codeforces | Codeforces Round #395 (Div. 1) & Codeforces Round #395 (Div. 2) | 8 | |
| 426 | Gosha is hunting | Codeforces | Codeforces Round #381 (Div. 1) | 8 | |
| 427 | Mother of Dragons | Codeforces | Codeforces Round #428 (Div. 2) | 8 | |
| 428 | Rats | Codeforces | Codeforces Round #155 (Div. 2) | 9 | |
| 429 | Race | Codeforces | Bayan 2012-2013 Elimination Round (ACM ICPC Rules, English statements) | 9 | |
| 430 | Bitonix' Patrol | Codeforces | Codeforces Round #134 (Div. 1) | 9 | |
| 431 | Brand New Problem | Codeforces | Codeforces Round #127 (Div. 1) | 9 | |
| 432 | Gripping Story | Codeforces | Codeforces Round #125 (Div. 1) | 9 | |
| 433 | Fibonacci Number | Codeforces | Codeforces Round #122 (Div. 1) | 9 | |
| 434 | Power Defence | Codeforces | Codeforces Round #115 | 9 | |
| 435 | Plane of Tanks: Duel | Codeforces | Codeforces Round #115 | 9 | |
| 436 | Minimum Diameter | Codeforces | VK Cup 2012 Round 3 | 9 | |
| 437 | Large Refrigerator | Codeforces | VK Cup 2012 Round 2 | 9 | |
| 438 | Frames | Codeforces | Codeforces Round #108 (Div. 2) | 9 | |
| 439 | Cycle | Codeforces | Codeforces Beta Round #97 (Div. 1) | 9 | |
| 440 | Item World | Codeforces | Codeforces Beta Round #81 | 9 | |
| 441 | Domino | Codeforces | Yandex.Algorithm 2011 Finals | 9 | |
| 442 | Azembler | Codeforces | Codeforces Beta Round #76 (Div. 1 Only) & Codeforces Beta Round #76 (Div. 2 Only) | 9 | |
| 443 | Solitaire | Codeforces | Codeforces Beta Round #65 (Div. 2) | 9 | |
| 444 | Synchrophasotron | Codeforces | Codeforces Beta Round #62 | 9 | |
| 445 | Harry Potter and the Sorting Hat | Codeforces | Codeforces Beta Round #60 | 9 | |
| 446 | Prime Segment | Codeforces | Unknown Language Round #1 | 9 | |
| 447 | Savior | Codeforces | Codeforces Beta Round #56 | 9 | |
| 448 | Writing a Song | Codeforces | Codeforces Beta Round #50 | 9 | |
| 449 | Race | Codeforces | Codeforces Beta Round #42 (Div. 2) | 9 | |
| 450 | Walls | Live Archive | 2012 | North America - Southeast USA | 9 |
| 451 | BLOCK_D SOLVER | SPOJ | 9 | ||
| 452 | Task processing | Codeforces | 2015-2016 ACM-ICPC, NEERC, Southern Subregional Contest (Online Mirror, ACM-ICPC Rules, Teams Preferred) | 9 | |
| 453 | Sign Posts | Codeforces | Codeforces Round #315 (Div. 1) | 9 | |
| 454 | Pasha and Pipe | Codeforces | Codeforces Round #293 (Div. 2) | 9 | |
| 455 | Roland and Rose | Codeforces | Codeforces Round #262 (Div. 2) | 9 | |
| 456 | Physical Education and Buns | Codeforces | Codeforces Round #231 (Div. 2) | 9 | |
| 457 | Supercollider | Codeforces | Rockethon 2014 | 9 | |
| 458 | The Tournament | Codeforces | Rockethon 2014 | 9 | |
| 459 | Word Folding | Codeforces | Rockethon 2014 | 9 | |
| 460 | Dima and Kicks | Codeforces | Codeforces Round #208 (Div. 2) | 9 | |
| 461 | Pumping Stations | Codeforces | Codeforces Round #200 (Div. 1) | 9 | |
| 462 | Rectangles and Square | Codeforces | MemSQL start[c]up Round 2 - online version | 9 | |
| 463 | Lucky Tickets | Codeforces | Codeforces Round #194 (Div. 1) & Codeforces Round #194 (Div. 2) | 9 | |
| 464 | PE Lesson | Codeforces | ABBYY Cup 3.0 | 9 | |
| 465 | Fetch the Treasure | Codeforces | Codeforces Round #185 (Div. 1) & Codeforces Round #185 (Div. 2) | 9 | |
| 466 | Shaass and Painter Robot | Codeforces | Codeforces Round #178 (Div. 2) | 9 | |
| 467 | The Last Hole! | Codeforces | Codeforces Round #168 (Div. 1) & Codeforces Round #168 (Div. 2) | 9 | |
| 468 | Rhombus | Codeforces | Codeforces Round #161 (Div. 2) | 9 | |
| 469 | Maxim and Calculator | Codeforces | Codeforces Round #160 (Div. 1) | 9 | |
| 470 | Dividing Kingdom | Codeforces | Codeforces Round #158 (Div. 2) | 9 | |
| 471 | Travelling Through the Snow Queen's Kingdom | Codeforces | Codeforces Round #359 (Div. 1) | 9 | |
| 472 | Bear and Chase | Codeforces | Codeforces Round #356 (Div. 1) | 9 | |
| 473 | Ever-Hungry Krakozyabra | Codeforces | Codeforces Round #426 (Div. 1) & Codeforces Round #426 (Div. 2) | 9 | |
| 474 | Dasha and cyclic table | Codeforces | Codeforces Round #390 (Div. 2) | 9 | |
| 475 | Hellish Constraints | Codeforces | Codeforces Beta Round #99 (Div. 1) | 10 | |
| 476 | Pills | Codeforces | Codeforces Beta Round #93 (Div. 1 Only) | 10 | |
| 477 | Lucky Interval | Codeforces | Codeforces Beta Round #84 (Div. 1 Only) | 10 | |
| 478 | Lift and Throw | Codeforces | Codeforces Beta Round #81 | 10 | |
| 479 | Robot in Basement | Codeforces | Yandex.Algorithm 2011 Finals | 10 | |
| 480 | Long sequence | Codeforces | Yandex.Algorithm 2011 Round 2 | 10 | |
| 481 | Plane of Tanks | Codeforces | Codeforces Beta Round #66 | 10 | |
| 482 | Ali goes shopping | Codeforces | Unknown Language Round #2 | 10 | |
| 483 | Toys | Codeforces | School Team Contest #2 (Winter Computer School 2010/11) | 10 | |
| 484 | To Hack or not to Hack | Codeforces | CROC 2016 - Final Round [Private, For Onsite Finalists Only] | 10 | |
| 485 | Party | Codeforces | Bubble Cup 8 - Finals [Online Mirror] | 10 | |
| 486 | Gears | Codeforces | Codeforces Round #283 (Div. 1) | 10 | |
| 487 | Wavy numbers | Codeforces | Codeforces Round #273 (Div. 2) | 10 | |
| 488 | Banners | Codeforces | Zepto Code Rush 2014 | 10 | |
| 489 | Two Circles | Codeforces | Codeforces Round #211 (Div. 2) | 10 | |
| 490 | Tennis Rackets | Codeforces | Croc Champ 2013 - Finals (online version, Div. 1) | 10 | |
| 491 | Mrs. Hudson's Pancakes | Codeforces | Codeforces Round #110 (Div. 1) | 10 | |
| 492 | Entertaining Geodetics | Codeforces | Codeforces Beta Round #81 | 10 | |
| 493 | Chain Reaction | Codeforces | Codeforces Round #349 (Div. 1) & Codeforces Round #349 (Div. 2) | 10 | |
| 494 | The Overdosing Ubiquity | Codeforces | Codeforces Round #439 (Div. 2) | 10 |