| Problem Name | Online Judge | Year | Contest | Difficulty Level | |
|---|---|---|---|---|---|
| 1 | Ice Skating | Codeforces | Codeforces Round #134 (Div. 1) & Codeforces Round #134 (Div. 2) | 1 | |
| 2 | Party | Codeforces | Codeforces Beta Round #87 (Div. 1 Only) & Codeforces Beta Round #87 (Div. 2 Only) | 1 | |
| 3 | Dijkstra? | Codeforces | Codeforces Alpha Round #20 (Codeforces format) | 1 | |
| 4 | The Dueling Philosophers Problem | Live Archive | 2012 | North America - Mid-Atlantic USA | 1 |
| 5 | Graph Connectivity | UVA | 1 | ||
| 6 | Network Connections | UVA | 1 | ||
| 7 | Travel | TJU | 1 | ||
| 8 | Greatest K-Palindrome Substring | Live Archive | 2008 | Asia - Jakarta | 1 |
| 9 | Searching the Graph | SPOJ | 1 | ||
| 10 | A Node Too Far | UVA | 1 | ||
| 11 | Pouring water | SPOJ | 1 | ||
| 12 | The Decoder | UVA | 1 | ||
| 13 | Easy Problem from Rujia Liu? | UVA | 1 | ||
| 14 | Two Buttons | Codeforces | Codeforces Round #295 (Div. 2) | 1 | |
| 15 | New Year Transportation | Codeforces | Good Bye 2014 | 1 | |
| 16 | Road Construction | Codeforces | Codeforces Round #192 (Div. 2) | 1 | |
| 17 | Young Physicist | Codeforces | Codeforces Beta Round #63 (Div. 2) | 1 | |
| 18 | Binary Numbers | TJU | 1 | ||
| 19 | NP-Hard Problem | Codeforces | Codeforces Round #360 (Div. 1) & Codeforces Round #360 (Div. 2) | 1 | |
| 20 | Bakery | Codeforces | Codeforces Round #368 (Div. 2) | 1 | |
| 21 | Luggage | UVA | 1 | ||
| 22 | Hotels Along the Croatian Coast | SPOJ | 1 | ||
| 23 | 05-2 Rendezvous | UVA | 2 | ||
| 24 | Numbering Paths | UVA | 2 | ||
| 25 | Topological Sorting | Timus | 2 | ||
| 26 | True Friends | SPOJ | 2 | ||
| 27 | Matrix Transpose | UVA | 2 | ||
| 28 | Bear and Forgotten Tree 3 | Codeforces | VK Cup 2016 - Round 1 | 2 | |
| 29 | The Two Routes | Codeforces | Codeforces Round #333 (Div. 1) & Codeforces Round #333 (Div. 2) | 2 | |
| 30 | Bear and Three Musketeers | Codeforces | Codeforces Round #318 [RussianCodeCup Thanks-Round] (Div. 2) | 2 | |
| 31 | Reposts | Codeforces | VK Cup 2015 - Qualification Round 1 | 2 | |
| 32 | Fox And Names | Codeforces | Codeforces Round #290 (Div. 2) & Codeforces Round #290 (Div. 1) | 2 | |
| 33 | 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 | |
| 34 | New Year Permutation | Codeforces | Good Bye 2014 | 2 | |
| 35 | Strongly Connected City | Codeforces | Bayan 2015 Contest Warm Up | 2 | |
| 36 | The Child and Toy | Codeforces | Codeforces Round #250 (Div. 2) & Codeforces Round #250 (Div. 1) | 2 | |
| 37 | Checkposts | Codeforces | Codeforces Round #244 (Div. 2) | 2 | |
| 38 | Catenyms | PKU | 2 | ||
| 39 | Colorful Graph | Codeforces | Codeforces Round #151 (Div. 2) | 3 | |
| 40 | Students and Shoelaces | Codeforces | Codeforces Beta Round #94 (Div. 2 Only) | 3 | |
| 41 | Cthulhu | Codeforces | Codeforces Beta Round #80 (Div. 1 Only) & Codeforces Beta Round #80 (Div. 2 Only) | 3 | |
| 42 | Going in Cycle!! | UVA | 3 | ||
| 43 | AlmostBipartiteMatching | TopCoder | TCCC06 Wildcard - Div1 easy] (10135) | 3 | |
| 44 | Two Rounds | Timus | 3 | ||
| 45 | New Reform | Codeforces | Codeforces Round #346 (Div. 2) | 3 | |
| 46 | Graph and String | Codeforces | AIM Tech Round (Div. 1) & AIM Tech Round (Div. 2) | 3 | |
| 47 | Longtail Hedgehog | Codeforces | Codeforces Round #338 (Div. 2) | 3 | |
| 48 | Unbearable Controversy of Being | Codeforces | Codeforces Round #277.5 (Div. 2) | 3 | |
| 49 | Gargari and Permutations | Codeforces | Codeforces Round #264 (Div. 2) | 3 | |
| 50 | Football | Codeforces | RCC 2014 Warmup (Div. 2) & RCC 2014 Warmup (Div. 1) | 3 | |
| 51 | Valera and Elections | Codeforces | Codeforces Round #216 (Div. 2) | 3 | |
| 52 | Ping-Pong (Easy Version) | Codeforces | Codeforces Round #189 (Div. 2) | 3 | |
| 53 | Greg and Graph | Codeforces | Codeforces Round #179 (Div. 1) & Codeforces Round #179 (Div. 2) | 3 | |
| 54 | Network Topology | Codeforces | Croc Champ 2013 - Round 1 | 3 | |
| 55 | Searching for Graph | Codeforces | Codeforces Round #236 (Div. 2) & Codeforces Round #236 (Div. 1) | 3 | |
| 56 | Misha and Forest | Codeforces | Codeforces Round #285 (Div. 2) & Codeforces Round #285 (Div. 1) | 3 | |
| 57 | Wedding of Sultan | UVA | 3 | ||
| 58 | As Long as I Learn, I Live | UVA | 3 | ||
| 59 | Hongcow Builds A Nation | Codeforces | Codeforces Round #385 (Div. 1) & Codeforces Round #385 (Div. 2) | 3 | |
| 60 | Journey | Codeforces | Codeforces Round #374 (Div. 2) | 3 | |
| 61 | Cryptography | A2 Online Judge | 3 | ||
| 62 | King's Path | Codeforces | Codeforces Round #149 (Div. 2) | 4 | |
| 63 | Subway | Codeforces | Codeforces Beta Round #95 (Div. 2) | 4 | |
| 64 | Dorm Water Supply | Codeforces | Codeforces Beta Round #83 (Div. 1 Only) & Codeforces Beta Round #83 (Div. 2 Only) | 4 | |
| 65 | Eternal Victory | Codeforces | Codeforces Beta Round #57 (Div. 2) | 4 | |
| 66 | Road Map | Codeforces | Codeforces Beta Round #34 (Div. 2) | 4 | |
| 67 | Roads not only in Berland | Codeforces | Codeforces Beta Round #25 (Div. 2 Only) | 4 | |
| 68 | Roads in Berland | Codeforces | Codeforces Beta Round #25 (Div. 2 Only) | 4 | |
| 69 | Ring road | Codeforces | Codeforces Beta Round #24 | 4 | |
| 70 | Graph Cut | SPOJ | 4 | ||
| 71 | The Forrest for the Trees | Live Archive | 1997 | North America - Greater NY | 4 |
| 72 | Gincana | SPOJ Brazil | 4 | ||
| 73 | Instant View of Big Bang | UVA | 4 | ||
| 74 | Dream | UVA | 4 | ||
| 75 | Two Companies | CodeChef | 4 | ||
| 76 | The Scrooge Co Problem | UVA | 4 | ||
| 77 | Lazy Student | Codeforces | Codeforces Round #335 (Div. 1) & Codeforces Round #335 (Div. 2) | 4 | |
| 78 | Regular Bridge | Codeforces | Codeforces Round #306 (Div. 2) | 4 | |
| 79 | Paths and Trees | Codeforces | Codeforces Round #303 (Div. 2) | 4 | |
| 80 | Destroying Roads | Codeforces | Codeforces Round #302 (Div. 1) & Codeforces Round #302 (Div. 2) | 4 | |
| 81 | New Year Santa Network | Codeforces | Good Bye 2014 | 4 | |
| 82 | Jzzhu and Cities | Codeforces | Codeforces Round #257 (Div. 1) & Codeforces Round #257 (Div. 2) | 4 | |
| 83 | Restore Graph | Codeforces | Codeforces Round #237 (Div. 2) | 4 | |
| 84 | Cow Program | Codeforces | Codeforces Round #174 (Div. 1) & Codeforces Round #174 (Div. 2) | 4 | |
| 85 | The Explosion | SPOJ | 4 | ||
| 86 | Connecting Universities | Codeforces | Codeforces Round #364 (Div. 1) & Codeforces Round #364 (Div. 2) | 4 | |
| 87 | Alyona and a tree | Codeforces | Codeforces Round #381 (Div. 1) & Codeforces Round #381 (Div. 2) | 4 | |
| 88 | Resort | Codeforces | Codeforces Round #203 (Div. 2) | 4 | |
| 89 | Directed Roads | Codeforces | Codeforces Round #369 (Div. 2) | 4 | |
| 90 | Garland | Codeforces | Codeforces Round #398 (Div. 2) | 4 | |
| 91 | Ivan's Car | Timus | 4 | ||
| 92 | Union of Doubly Linked Lists | Codeforces | 2017-2018 ACM-ICPC, NEERC, Southern Subregional Contest, qualification stage (Online Mirror, ACM-ICPC Rules, Teams Preferred) | 4 | |
| 93 | Simple Dijkstras algorithm | SPOJ | 4 | ||
| 94 | Reachability from the Capital | Codeforces | Codeforces Round #490 (Div. 3) | 4 | |
| 95 | Cycles | Codeforces | Codeforces Round #144 (Div. 1) & Codeforces Round #144 (Div. 2) | 5 | |
| 96 | Missile Silos | Codeforces | Codeforces Round #103 (Div. 2) | 5 | |
| 97 | Help General | Codeforces | Codeforces Round #102 (Div. 1) & Codeforces Round #102 (Div. 2) | 5 | |
| 98 | Cycle | Codeforces | Codeforces Beta Round #88 | 5 | |
| 99 | Volleyball | Codeforces | Codeforces Beta Round #77 (Div. 1 Only) & Codeforces Beta Round #77 (Div. 2 Only) | 5 | |
| 100 | Mail Stamps | Codeforces | Codeforces Beta Round #29 (Div. 2, Codeforces format) | 5 | |
| 101 | pSort | Codeforces | Codeforces Beta Round #28 (Codeforces format) | 5 | |
| 102 | Two Paths | Codeforces | Codeforces Beta Round #14 (Div. 2) | 5 | |
| 103 | A Simple Task | Codeforces | Codeforces Beta Round #11 | 5 | |
| 104 | Clique in the Divisibility Graph | Codeforces | VK Cup 2015 - Finals, online mirror | 5 | |
| 105 | Graph Coloring | Live Archive | 1995 | Europe - Southwestern | 5 |
| 106 | Robot Rapping Results Report | Codeforces | CROC 2016 - Elimination Round | 5 | |
| 107 | Minimum spanning tree for each edge | Codeforces | Educational Codeforces Round 3 | 5 | |
| 108 | Three States | Codeforces | Codeforces Round #327 (Div. 1) & Codeforces Round #327 (Div. 2) | 5 | |
| 109 | Vitaly and Cycle | Codeforces | Codeforces Round #311 (Div. 2) | 5 | |
| 110 | Breaking Good | Codeforces | Codeforces Round #287 (Div. 2) | 5 | |
| 111 | Dungeons and Candies | Codeforces | Zepto Code Rush 2014 | 5 | |
| 112 | Dima and Bacteria | Codeforces | Codeforces Round #234 (Div. 2) | 5 | |
| 113 | Fox and Minimal path | Codeforces | Codeforces Round #228 (Div. 1) & Codeforces Round #228 (Div. 2) | 5 | |
| 114 | Inna and Dima | Codeforces | Codeforces Round #220 (Div. 2) | 5 | |
| 115 | Block Tower | Codeforces | Codeforces Round #191 (Div. 2) | 5 | |
| 116 | Yaroslav and Time | Codeforces | Codeforces Round #182 (Div. 1) & Codeforces Round #182 (Div. 2) | 5 | |
| 117 | Cycle in Graph | Codeforces | Codeforces Round #161 (Div. 2) | 5 | |
| 118 | Obsession with Robots | Codeforces | Codeforces Beta Round #8 | 5 | |
| 119 | Complete The Graph | Codeforces | Codeforces Round #372 (Div. 1) & Codeforces Round #372 (Div. 2) | 5 | |
| 120 | Weird journey | Codeforces | Codeforces Round #407 (Div. 1) & Codeforces Round #407 (Div. 2) | 5 | |
| 121 | Mahmoud and a Dictionary | Codeforces | Codeforces Round #396 (Div. 2) | 5 | |
| 122 | Critical Links | Live Archive | 1997 | Europe - Southeastern | 5 |
| 123 | Hydra | Codeforces | Codeforces Round #150 (Div. 1) & Codeforces Round #150 (Div. 2) | 6 | |
| 124 | Dispute | Codeforces | Codeforces Round #149 (Div. 2) | 6 | |
| 125 | Triangles | Codeforces | Codeforces Round #142 (Div. 1) & Codeforces Round #142 (Div. 2) | 6 | |
| 126 | The Road to Berland is Paved With Good Intentions | Codeforces | Codeforces Round #141 (Div. 2) | 6 | |
| 127 | Police Station | Codeforces | Codeforces Round #130 (Div. 2) | 6 | |
| 128 | Party | Codeforces | ABBYY Cup 2.0 - Easy | 6 | |
| 129 | Party | Codeforces | ABBYY Cup 2.0 - Easy | 6 | |
| 130 | Double Profiles | Codeforces | Codeforces Round #109 (Div. 1) & Codeforces Round #109 (Div. 2) | 6 | |
| 131 | Bertown roads | Codeforces | Codeforces Beta Round #89 (Div. 2) | 6 | |
| 132 | 3-cycles | Codeforces | Codeforces Beta Round #40 (Div. 2) | 6 | |
| 133 | Ring Road 2 | Codeforces | Codeforces Beta Round #27 (Codeforces format, Div. 2) | 6 | |
| 134 | System Administrator | Codeforces | Codeforces Beta Round #22 (Div. 2 Only) | 6 | |
| 135 | Military patrol | SPOJ | 6 | ||
| 136 | In Defence of a Garden | Live Archive | 2002 | North America - Mid-Atlantic USA | 6 |
| 137 | Join two kingdoms | UVA | 6 | ||
| 138 | Information Graph | Codeforces | Codeforces Round #266 (Div. 2) | 6 | |
| 139 | Polycarp and Hay | Codeforces | Codeforces Round #346 (Div. 2) | 6 | |
| 140 | Table Compression | Codeforces | Codeforces Round #345 (Div. 1) & Codeforces Round #345 (Div. 2) | 6 | |
| 141 | Love Triangles | Codeforces | Codeforces Round #309 (Div. 1) & Codeforces Round #309 (Div. 2) | 6 | |
| 142 | Work Group | Codeforces | VK Cup 2015 - Round 2 (unofficial online mirror, Div. 1 only) | 6 | |
| 143 | Tanya and Password | Codeforces | Codeforces Round #288 (Div. 2) | 6 | |
| 144 | Fedor and Essay | Codeforces | Codeforces Round #267 (Div. 2) | 6 | |
| 145 | Strictly Positive Matrix | Codeforces | Codeforces Round #236 (Div. 2) & Codeforces Round #236 (Div. 1) | 6 | |
| 146 | Sereja and the Arrangement of Numbers | Codeforces | Codeforces Round #215 (Div. 1) & Codeforces Round #215 (Div. 2) | 6 | |
| 147 | Greg and Friends | Codeforces | Codeforces Round #179 (Div. 1) & Codeforces Round #179 (Div. 2) | 6 | |
| 148 | Flawed Flow | Codeforces | Codeforces Round #165 (Div. 1) & Codeforces Round #165 (Div. 2) | 6 | |
| 149 | Partial Teacher | Codeforces | Manthan 2011 | 6 | |
| 150 | Party | Codeforces | Codeforces Beta Round #23 | 6 | |
| 151 | World Tour | Codeforces | Codeforces Round #349 (Div. 1) & Codeforces Round #349 (Div. 2) | 6 | |
| 152 | Mr. Kitayuta's Technology | Codeforces | Codeforces Round #286 (Div. 2) & Codeforces Round #286 (Div. 1) | 6 | |
| 153 | Vanya and Treasure | Codeforces | Codeforces Round #355 (Div. 2) | 6 | |
| 154 | CompilingDecksWithJokers | TopCoder | SRM 380 - Div1 medium - Div2 hard] (10802) | 6 | |
| 155 | Leha and another game about graph | Codeforces | Codeforces Round #429 (Div. 1) & Codeforces Round #429 (Div. 2) | 6 | |
| 156 | Legacy | Codeforces | Codeforces Round #406 (Div. 1) & Codeforces Round #406 (Div. 2) | 6 | |
| 157 | The Great Mixing | Codeforces | Codeforces Round #407 (Div. 1) & Codeforces Round #407 (Div. 2) | 6 | |
| 158 | Vladik and Favorite Game | Codeforces | Codeforces Round #416 (Div. 2) | 6 | |
| 159 | Shortest Path | A2 Online Judge | 6 | ||
| 160 | A Pair of Graphs | Live Archive | 2008 | Asia - Hangzhou | 6 |
| 161 | Increasing Shortest Path | A2 Online Judge | 6 | ||
| 162 | Color the Map | Live Archive | 2004 | Asia - Ehime | 6 |
| 163 | Build String | Codeforces | Codeforces Round #147 (Div. 2) | 7 | |
| 164 | Cactus | Codeforces | Codeforces Round #143 (Div. 2) | 7 | |
| 165 | Snake | Codeforces | Codeforces Round #139 (Div. 2) | 7 | |
| 166 | Counter Attack | Codeforces | Codeforces Round #120 (Div. 2) | 7 | |
| 167 | Variable, or There and Back Again | Codeforces | VK Cup 2012 Round 3 | 7 | |
| 168 | Edges in MST | Codeforces | Codeforces Round #111 (Div. 2) | 7 | |
| 169 | Lucky Country | Codeforces | Codeforces Beta Round #77 (Div. 1 Only) | 7 | |
| 170 | Ski Base | Codeforces | Codeforces Beta Round #75 (Div. 1 Only) & Codeforces Beta Round #75 (Div. 2 Only) | 7 | |
| 171 | Gift | Codeforces | All-Ukrainian School Olympiad in Informatics | 7 | |
| 172 | Chessboard Billiard | Codeforces | Codeforces Beta Round #68 | 7 | |
| 173 | Shortest Path | Codeforces | Codeforces Beta Round #55 (Div. 2) | 7 | |
| 174 | Knights | Codeforces | Codeforces Beta Round #33 (Codeforces format) | 7 | |
| 175 | Graph Reconstruction | Codeforces | Codeforces Round #192 (Div. 1) & Codeforces Round #192 (Div. 2) | 7 | |
| 176 | Non-Stop Travel | Live Archive | 1995 | North America - North Central NA | 7 |
| 177 | Bear and Forgotten Tree 2 | Codeforces | IndiaHacks 2016 - Online Edition (Div. 1 + Div. 2) | 7 | |
| 178 | Pursuit For Artifacts | Codeforces | Educational Codeforces Round 10 | 7 | |
| 179 | Three-dimensional Turtle Super Computer | Codeforces | VK Cup 2016 - Qualification Round 2 | 7 | |
| 180 | Square Root of Permutation | Codeforces | Educational Codeforces Round 4 | 7 | |
| 181 | President and Roads | Codeforces | Codeforces Round #Pi (Div. 2) | 7 | |
| 182 | Case of Computer Network | Codeforces | Codeforces Round #310 (Div. 1) | 7 | |
| 183 | Nudist Beach | Codeforces | Codeforces Round #309 (Div. 1) | 7 | |
| 184 | Mike and Fish | Codeforces | Codeforces Round #305 (Div. 1) | 7 | |
| 185 | Idempotent functions | Codeforces | VK Cup 2015 - Round 3 (unofficial online mirror, Div. 1 only) | 7 | |
| 186 | Data Center Drama | Codeforces | Codeforces Round #296 (Div. 2) & Codeforces Round #296 (Div. 1) | 7 | |
| 187 | Valera and Swaps | Codeforces | Codeforces Round #252 (Div. 2) | 7 | |
| 188 | Bug in Code | Codeforces | Coder-Strike 2014 - Finals (online edition, Div. 2) & Coder-Strike 2014 - Finals (online edition, Div. 1) & Coder-Strike 2014 - Finals (online edition, Div. 2) & Coder-Strike 2014 - Finals (online edition, Div. 1) | 7 | |
| 189 | President's Path | Codeforces | Codeforces Round #241 (Div. 2) | 7 | |
| 190 | Ksenia and Pawns | Codeforces | Codeforces Round #224 (Div. 2) | 7 | |
| 191 | Fools and Foolproof Roads | Codeforces | Codeforces Round #212 (Div. 2) | 7 | |
| 192 | Wrong Floyd | Codeforces | Codeforces Round #203 (Div. 2) | 7 | |
| 193 | Lovely Matrix | Codeforces | Codeforces Round #168 (Div. 1) | 7 | |
| 194 | Dima and Horses | Codeforces | Codeforces Round #167 (Div. 2) & Codeforces Round #167 (Div. 1) | 7 | |
| 195 | Black and White Tree | Codeforces | Codeforces Round #158 (Div. 2) | 7 | |
| 196 | Graph Cutting | Codeforces | Codeforces Round #238 (Div. 2) & Codeforces Round #238 (Div. 1) | 7 | |
| 197 | Envy | Codeforces | Codeforces Round #446 (Div. 1) & Codeforces Round #446 (Div. 2) | 7 | |
| 198 | Ant Man | Codeforces | Codeforces Round #366 (Div. 1) & Codeforces Round #366 (Div. 2) | 7 | |
| 199 | Okabe and City | Codeforces | Codeforces Round #420 (Div. 2) | 7 | |
| 200 | Ralph and Mushrooms | Codeforces | Codeforces Round #447 (Div. 2) | 7 | |
| 201 | Suggested Friends | Codeforces | CROC-MBTU 2012, Elimination Round (ACM-ICPC) | 8 | |
| 202 | Flights | Codeforces | Bayan 2012-2013 Elimination Round (ACM ICPC Rules, English statements) | 8 | |
| 203 | T-decomposition | Codeforces | Codeforces Round #147 (Div. 2) | 8 | |
| 204 | Trails and Glades | Codeforces | VK Cup 2012 Finals, Practice Session | 8 | |
| 205 | Opening Portals | Codeforces | Codeforces Round #124 (Div. 1) | 8 | |
| 206 | Clues | Codeforces | Codeforces Round #110 (Div. 1) | 8 | |
| 207 | Smile House | Codeforces | Codeforces Testing Round #4 | 8 | |
| 208 | Clearing Up | Codeforces | Codeforces Round #101 (Div. 2) | 8 | |
| 209 | Take-off Ramps | Codeforces | Codeforces Round #101 (Div. 2) | 8 | |
| 210 | Swaps | Codeforces | Codeforces Testing Round #3 | 8 | |
| 211 | MST Company | Codeforces | Codeforces Testing Round #2 | 8 | |
| 212 | Widget Library | Codeforces | Codeforces Beta Round #74 (Div. 1 Only) & Codeforces Beta Round #74 (Div. 2 Only) | 8 | |
| 213 | Guard Towers | Codeforces | Yandex.Algorithm 2011 Round 1 | 8 | |
| 214 | FreeDiv | Codeforces | Codeforces Beta Round #66 | 8 | |
| 215 | Quarrel | Codeforces | Codeforces Beta Round #29 (Div. 2, Codeforces format) | 8 | |
| 216 | Tickets | Codeforces | Codeforces Beta Round #26 (Codeforces format) | 8 | |
| 217 | Traveling Graph | Codeforces | Codeforces Alpha Round #21 (Codeforces format) | 8 | |
| 218 | Interestring graph and Apples | Codeforces | Codeforces Beta Round #9 (Div. 2 Only) | 8 | |
| 219 | In Defence of a Garden | PKU | 8 | ||
| 220 | Magic Matrix | Codeforces | Educational Codeforces Round 9 | 8 | |
| 221 | Kingdom and its Cities | Codeforces | Codeforces Round #339 (Div. 1) | 8 | |
| 222 | CNF 2 | Codeforces | Codeforces Round #317 [AimFund Thanks-Round] (Div. 1) & Codeforces Round #317 [AimFund Thanks-Round] (Div. 2) | 8 | |
| 223 | Playing on Graph | Codeforces | VK Cup 2015 - Round 3 (unofficial online mirror, Div. 1 only) | 8 | |
| 224 | Tourists | Codeforces | Codeforces Round #278 (Div. 1) | 8 | |
| 225 | Parcels | Codeforces | Codeforces Round #274 (Div. 1) | 8 | |
| 226 | Points and Segments | Codeforces | Codeforces Round #245 (Div. 1) | 8 | |
| 227 | Sereja and Tree | Codeforces | Codeforces Round #223 (Div. 1) & Codeforces Round #223 (Div. 2) | 8 | |
| 228 | Petya and Pipes | Codeforces | Codeforces Round #212 (Div. 2) | 8 | |
| 229 | Balance | Codeforces | Codeforces Round #188 (Div. 1) & Codeforces Round #188 (Div. 2) | 8 | |
| 230 | Dominoes | Codeforces | Codeforces Testing Round #5 | 8 | |
| 231 | BerDonalds | Codeforces | Codeforces Round #163 (Div. 2) | 8 | |
| 232 | Scheme | Codeforces | Codeforces Beta Round #22 (Div. 2 Only) | 8 | |
| 233 | Beads | Codeforces | Codeforces Beta Round #8 | 8 | |
| 234 | Tournament | Codeforces | Codeforces Round #443 (Div. 1) & Codeforces Round #443 (Div. 2) | 8 | |
| 235 | Vladik and Entertaining Flags | Codeforces | Codeforces Round #416 (Div. 2) | 8 | |
| 236 | Mother of Dragons | Codeforces | Codeforces Round #428 (Div. 2) | 8 | |
| 237 | Graph basics concepts | SPOJ | 8 | ||
| 238 | Road Repairs | Codeforces | Codeforces Round #145 (Div. 1, ACM-ICPC Rules) | 9 | |
| 239 | Meeting Her | Codeforces | Codeforces Round #148 (Div. 1) | 9 | |
| 240 | Graph Game | Codeforces | Codeforces Round #146 (Div. 1) | 9 | |
| 241 | Metro Scheme | Codeforces | Codeforces Round #121 (Div. 1) | 9 | |
| 242 | Battlefield | Codeforces | Codeforces Round #117 (Div. 2) | 9 | |
| 243 | Deputies | Codeforces | Croc Champ 2012 - Round 1 | 9 | |
| 244 | Garden | Codeforces | Codeforces Round #108 (Div. 2) | 9 | |
| 245 | Maze | Codeforces | Codeforces Beta Round #92 (Div. 1 Only) | 9 | |
| 246 | Winning Strategy | Codeforces | Yandex.Algorithm 2011 Finals | 9 | |
| 247 | Grocer's Problem | Codeforces | Codeforces Beta Round #75 (Div. 1 Only) | 9 | |
| 248 | Track | Codeforces | Codeforces Beta Round #72 (Div. 1 Only) & Codeforces Beta Round #72 (Div. 2 Only) | 9 | |
| 249 | Evacuation | Codeforces | Codeforces Beta Round #70 (Div. 2) | 9 | |
| 250 | Wormhouse | Codeforces | Codeforces Beta Round #58 | 9 | |
| 251 | Caterpillar | Codeforces | Codeforces Beta Round #48 | 9 | |
| 252 | Pentagon | Codeforces | Codeforces Beta Round #48 | 9 | |
| 253 | Ivan the Fool VS Gorynych the Dragon | Codeforces | School Personal Contest #3 (Winter Computer School 2010/11) - Codeforces Beta Round #45 (ACM-ICPC Rules) | 9 | |
| 254 | Hercule Poirot Problem | Codeforces | School Personal Contest #2 (Winter Computer School 2010/11) - Codeforces Beta Round #43 (ACM-ICPC Rules) | 9 | |
| 255 | Trial for Chief | Codeforces | Codeforces Beta Round #37 | 9 | |
| 256 | Two Paths | Codeforces | Codeforces Beta Round #36 | 9 | |
| 257 | The Classic Problem | Codeforces | Codeforces Round #265 (Div. 1) | 9 | |
| 258 | Edge coloring of bipartite graph | Codeforces | Educational Codeforces Round 2 | 9 | |
| 259 | Wilbur and Strings | Codeforces | Codeforces Round #331 (Div. 2) | 9 | |
| 260 | Cycling City | Codeforces | Codeforces Round #295 (Div. 1) | 9 | |
| 261 | Big Problems for Organizers | Codeforces | RCC 2014 Warmup (Div. 1) | 9 | |
| 262 | Game with Points | Codeforces | Testing Round #9 | 9 | |
| 263 | Levko and Game | Codeforces | Codeforces Round #210 (Div. 1) | 9 | |
| 264 | Dima and Kicks | Codeforces | Codeforces Round #208 (Div. 2) | 9 | |
| 265 | Theft of Blueprints | Codeforces | Codeforces Round #193 (Div. 2) | 9 | |
| 266 | Pairs | Codeforces | Yandex.Algorithm Open 2011 Qualification 1 | 9 | |
| 267 | Travelling Through the Snow Queen's Kingdom | Codeforces | Codeforces Round #359 (Div. 1) | 9 | |
| 268 | Mister B and Flight to the Moon | Codeforces | Codeforces Round #421 (Div. 1) | 9 | |
| 269 | Sagheer and Kindergarten | Codeforces | Codeforces Round #417 (Div. 2) | 9 | |
| 270 | Mike and code of a permutation | Codeforces | Codeforces Round #410 (Div. 2) | 9 | |
| 271 | DFS | Codeforces | Lyft Level 5 Challenge 2018 - Final Round | 9 | |
| 272 | Doe Graphs | Codeforces | Codeforces Round #144 (Div. 1) & Codeforces Round #144 (Div. 2) | 10 | |
| 273 | Planar Graph | Codeforces | Codeforces Round #138 (Div. 1) | 10 | |
| 274 | Spider | Codeforces | Codeforces Round #138 (Div. 1) | 10 | |
| 275 | Privatization | Codeforces | VK Cup 2012 Finals (unofficial online-version) | 10 | |
| 276 | Gnomes of Might and Magic | Codeforces | Codeforces Round #115 | 10 | |
| 277 | Leaders | Codeforces | Yandex.Algorithm 2011 Finals | 10 | |
| 278 | Road Problem | Codeforces | School Team Contest #3 (Winter Computer School 2010/11) | 10 | |
| 279 | Baldman and the military | Codeforces | Codeforces Beta Round #41 | 10 | |
| 280 | Bear and Chemistry | Codeforces | VK Cup 2016 - Round 1 | 10 | |
| 281 | Island Puzzle | Codeforces | 8VC Venture Cup 2016 - Final Round | 10 | |
| 282 | Chain Letter | Codeforces | Friday the 13th, Programmers Day | 10 | |
| 283 | Deja Vu | Codeforces | ABBYY Cup 3.0 - Finals (online version) | 10 | |
| 284 | Escaping on Beaveractor | Codeforces | ABBYY Cup 3.0 - Finals (online version) | 10 | |
| 285 | Greedy Petya | Codeforces | April Fools Day Contest 2013 | 10 | |
| 286 | BerPaint | Codeforces | School Team Contest #2 (Winter Computer School 2010/11) | 10 | |
| 287 | Dynamic Programming | A2 Online Judge | 10 | ||
| 288 | Shake It! | Codeforces | Codeforces Round #431 (Div. 1) | 10 | |
| 289 | ALT | Codeforces | Codeforces Round #406 (Div. 1) | 10 | |
| 290 | Restore the Tree | Codeforces | Codeforces Round #440 (Div. 1, based on Technocup 2018 Elimination Round 2) | 10 | |
| 291 | The Overdosing Ubiquity | Codeforces | Codeforces Round #439 (Div. 2) | 10 |