| Problem Name | Online Judge | Contest | Difficulty Level | |
|---|---|---|---|---|
| 1 | Ice Skating | Codeforces | Codeforces Round #134 (Div. 1) & Codeforces Round #134 (Div. 2) | 1 |
| 2 | Graph Connectivity | UVA | 1 | |
| 3 | Network Connections | UVA | 1 | |
| 4 | Misha and Changing Handles | Codeforces | Codeforces Round #285 (Div. 2) | 1 |
| 5 | Learning Languages | Codeforces | Codeforces Round #170 (Div. 1) & Codeforces Round #170 (Div. 2) | 1 |
| 6 | 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 |
| 7 | 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 |
| 8 | New Year Permutation | Codeforces | Good Bye 2014 | 2 |
| 9 | DZY Loves Chemistry | Codeforces | Codeforces Round #254 (Div. 2) | 2 |
| 10 | Knight Tournament | Codeforces | Codeforces Round #207 (Div. 1) & Codeforces Round #207 (Div. 2) | 2 |
| 11 | The Suspects | UVA | 2 | |
| 12 | Timofey and a tree | Codeforces | Codeforces Round #395 (Div. 1) & Codeforces Round #395 (Div. 2) | 2 |
| 13 | 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 |
| 14 | FRIEND CIRCLE | SPOJ | 2 | |
| 15 | Lost and survived | SPOJ | 2 | |
| 16 | Anansi's Cobweb | Timus | 2 | |
| 17 | Strange Food Chain | SPOJ | 2 | |
| 18 | War | UVA | 2 | |
| 19 | Forests | UVA | 2 | |
| 20 | Cthulhu | Codeforces | Codeforces Beta Round #80 (Div. 1 Only) & Codeforces Beta Round #80 (Div. 2 Only) | 3 |
| 21 | New Reform | Codeforces | Codeforces Round #346 (Div. 2) | 3 |
| 22 | Mike and Feet | Codeforces | Codeforces Round #305 (Div. 1) & Codeforces Round #305 (Div. 2) | 3 |
| 23 | Queue | Codeforces | Codeforces Round #279 (Div. 2) | 3 |
| 24 | A + B Strikes Back | Codeforces | April Fools Day Contest 2014 | 3 |
| 25 | Arpa's weak amphitheater and Mehrdad's valuable Hoses | Codeforces | Codeforces Round #383 (Div. 1) & Codeforces Round #383 (Div. 2) | 3 |
| 26 | Social Network Community | SPOJ | 3 | |
| 27 | Dorm Water Supply | Codeforces | Codeforces Beta Round #83 (Div. 1 Only) & Codeforces Beta Round #83 (Div. 2 Only) | 4 |
| 28 | Roads not only in Berland | Codeforces | Codeforces Beta Round #25 (Div. 2 Only) | 4 |
| 29 | Lomsat gelral | Codeforces | Educational Codeforces Round 2 | 4 |
| 30 | Design Tutorial: Inverse the Problem | Codeforces | Codeforces Round #270 | 4 |
| 31 | Two Sets | Codeforces | Codeforces Round #268 (Div. 1) & Codeforces Round #268 (Div. 2) | 4 |
| 32 | Civilization | Codeforces | Codeforces Round #260 (Div. 1) & Codeforces Round #260 (Div. 2) | 4 |
| 33 | The Child and Zoo | Codeforces | Codeforces Round #250 (Div. 2) & Codeforces Round #250 (Div. 1) | 4 |
| 34 | Vessels | Codeforces | Codeforces Round #218 (Div. 2) | 4 |
| 35 | Serial Time! | Codeforces | Codeforces Beta Round #56 | 4 |
| 36 | Clear Symmetry | Codeforces | Codeforces Round #127 (Div. 1) & Codeforces Round #127 (Div. 2) | 5 |
| 37 | Lucky Tree | Codeforces | Codeforces Beta Round #84 (Div. 1 Only) & Codeforces Beta Round #84 (Div. 2 Only) | 5 |
| 38 | pSort | Codeforces | Codeforces Beta Round #28 (Codeforces format) | 5 |
| 39 | Exposition | Codeforces | Codeforces Beta Round #6 (Div. 2 Only) | 5 |
| 40 | Minimum spanning tree for each edge | Codeforces | Educational Codeforces Round 3 | 5 |
| 41 | Moodular Arithmetic | Codeforces | Codeforces Round #334 (Div. 1) & Codeforces Round #334 (Div. 2) | 5 |
| 42 | Dungeons and Candies | Codeforces | Zepto Code Rush 2014 | 5 |
| 43 | Dima and Bacteria | Codeforces | Codeforces Round #234 (Div. 2) | 5 |
| 44 | Connected Components | Codeforces | Croc Champ 2013 - Round 1 | 5 |
| 45 | Hierarchy | Codeforces | Codeforces Beta Round #17 | 5 |
| 46 | Weird journey | Codeforces | Codeforces Round #407 (Div. 1) & Codeforces Round #407 (Div. 2) | 5 |
| 47 | Mahmoud and a Dictionary | Codeforces | Codeforces Round #396 (Div. 2) | 5 |
| 48 | The Road to Berland is Paved With Good Intentions | Codeforces | Codeforces Round #141 (Div. 2) | 6 |
| 49 | Party | Codeforces | ABBYY Cup 2.0 - Easy | 6 |
| 50 | Party | Codeforces | ABBYY Cup 2.0 - Easy | 6 |
| 51 | Holes | Codeforces | Codeforces Beta Round #13 | 6 |
| 52 | Polycarp and Hay | Codeforces | Codeforces Round #346 (Div. 2) | 6 |
| 53 | Table Compression | Codeforces | Codeforces Round #345 (Div. 1) & Codeforces Round #345 (Div. 2) | 6 |
| 54 | Restructuring Company | Codeforces | VK Cup 2015 - Finals, online mirror | 6 |
| 55 | Love Triangles | Codeforces | Codeforces Round #309 (Div. 1) & Codeforces Round #309 (Div. 2) | 6 |
| 56 | New Year Domino | Codeforces | Good Bye 2014 | 6 |
| 57 | Information Graph | Codeforces | Codeforces Round #266 (Div. 2) | 6 |
| 58 | Ring Road 2 | Codeforces | Codeforces Beta Round #27 (Codeforces format, Div. 2) | 6 |
| 59 | Counter Attack | Codeforces | Codeforces Round #120 (Div. 2) | 7 |
| 60 | Weak Memory | Codeforces | Codeforces Round #119 (Div. 1) & Codeforces Round #119 (Div. 2) | 7 |
| 61 | Range Increments | Codeforces | VK Cup 2012 Round 3 (Unofficial Div. 2 Edition) | 7 |
| 62 | Beard Graph | Codeforces | Codeforces Round #112 (Div. 2) | 7 |
| 63 | Edges in MST | Codeforces | Codeforces Round #111 (Div. 2) | 7 |
| 64 | Lucky Country | Codeforces | Codeforces Beta Round #77 (Div. 1 Only) | 7 |
| 65 | Ski Base | Codeforces | Codeforces Beta Round #75 (Div. 1 Only) & Codeforces Beta Round #75 (Div. 2 Only) | 7 |
| 66 | Beavermuncher-0xFF | Codeforces | Codeforces Beta Round #69 (Div. 1 Only) & Codeforces Beta Round #69 (Div. 2 Only) | 7 |
| 67 | Gift | Codeforces | All-Ukrainian School Olympiad in Informatics | 7 |
| 68 | Chessboard Billiard | Codeforces | Codeforces Beta Round #68 | 7 |
| 69 | Fairy | Codeforces | Codeforces Beta Round #19 | 7 |
| 70 | Bear and Forgotten Tree 2 | Codeforces | IndiaHacks 2016 - Online Edition (Div. 1 + Div. 2) | 7 |
| 71 | Pursuit For Artifacts | Codeforces | Educational Codeforces Round 10 | 7 |
| 72 | Acyclic Organic Compounds | Codeforces | Codeforces Round #333 (Div. 1) | 7 |
| 73 | Valera and Swaps | Codeforces | Codeforces Round #252 (Div. 2) | 7 |
| 74 | Nanami's Digital Board | Codeforces | Codeforces Round #248 (Div. 2) & Codeforces Round #248 (Div. 1) | 7 |
| 75 | Dima and Trap Graph | Codeforces | Codeforces Round #214 (Div. 2) | 7 |
| 76 | Fools and Foolproof Roads | Codeforces | Codeforces Round #212 (Div. 2) | 7 |
| 77 | Black and White Tree | Codeforces | Codeforces Round #158 (Div. 2) | 7 |
| 78 | Petya and Spiders | Codeforces | Codeforces Beta Round #85 (Div. 1 Only) & Codeforces Beta Round #85 (Div. 2 Only) | 7 |
| 79 | Bear and Square Grid | Codeforces | Codeforces Round #356 (Div. 1) & Codeforces Round #356 (Div. 2) | 7 |
| 80 | Envy | Codeforces | Codeforces Round #446 (Div. 1) & Codeforces Round #446 (Div. 2) | 7 |
| 81 | Peterson Polyglot | Codeforces | Codeforces Round #402 (Div. 1) & Codeforces Round #402 (Div. 2) | 7 |
| 82 | Digit Tree | Codeforces | Codeforces Round #372 (Div. 1) & Codeforces Round #372 (Div. 2) | 7 |
| 83 | Mad Joe | Codeforces | CROC-MBTU 2012, Final Round (Online version, Div. 2) | 8 |
| 84 | Trails and Glades | Codeforces | VK Cup 2012 Finals, Practice Session | 8 |
| 85 | Opening Portals | Codeforces | Codeforces Round #124 (Div. 1) | 8 |
| 86 | Building Forest | Codeforces | Codeforces Round #123 (Div. 2) | 8 |
| 87 | Clearing Up | Codeforces | Codeforces Round #101 (Div. 2) | 8 |
| 88 | Beautiful Road | Codeforces | Codeforces Beta Round #73 (Div. 1 Only) | 8 |
| 89 | Guard Towers | Codeforces | Yandex.Algorithm 2011 Round 1 | 8 |
| 90 | Interestring graph and Apples | Codeforces | Codeforces Beta Round #9 (Div. 2 Only) | 8 |
| 91 | Drazil and Morning Exercise | Codeforces | Codeforces Round #292 (Div. 1) | 8 |
| 92 | Three strings | Codeforces | MemSQL Start[c]UP 2.0 - Round 1 | 8 |
| 93 | DZY Loves Planting | Codeforces | Codeforces Round #254 (Div. 1) | 8 |
| 94 | Ilya and Two Numbers | Codeforces | Codeforces Round #186 (Div. 2) | 8 |
| 95 | Dividing Kingdom II | Codeforces | Codeforces Round #360 (Div. 1) | 8 |
| 96 | Vladik and Entertaining Flags | Codeforces | Codeforces Round #416 (Div. 2) | 8 |
| 97 | Alien DNA | Codeforces | Codeforces Round #134 (Div. 1) | 9 |
| 98 | Cutting a Fence | Codeforces | VK Cup 2012 Finals (unofficial online-version) | 9 |
| 99 | Savior | Codeforces | Codeforces Beta Round #56 | 9 |
| 100 | Hercule Poirot Problem | Codeforces | School Personal Contest #2 (Winter Computer School 2010/11) - Codeforces Beta Round #43 (ACM-ICPC Rules) | 9 |
| 101 | Two Paths | Codeforces | Codeforces Beta Round #36 | 9 |
| 102 | Clockwork Bomb | Codeforces | Codeforces Round #345 (Div. 1) | 9 |
| 103 | Pastoral Oddities | Codeforces | Codeforces Round #334 (Div. 1) | 9 |
| 104 | Appleman and Complicated Task | Codeforces | Codeforces Round #263 (Div. 1) | 9 |
| 105 | Dima and Kicks | Codeforces | Codeforces Round #208 (Div. 2) | 9 |
| 106 | The Red Button | Codeforces | MemSQL start[c]up Round 1 | 9 |
| 107 | Reclamation | Codeforces | MemSQL start[c]up Round 1 | 9 |
| 108 | Pairs | Codeforces | Yandex.Algorithm Open 2011 Qualification 1 | 9 |
| 109 | Timofey and our friends animals | Codeforces | Codeforces Round #395 (Div. 1) | 9 |
| 110 | Welcome home, Chtholly | Codeforces | Codeforces Round #449 (Div. 1) | 9 |
| 111 | Entertaining Geodetics | Codeforces | Codeforces Beta Round #81 | 10 |
| 112 | Leaders | Codeforces | Yandex.Algorithm 2011 Finals | 10 |
| 113 | Campus | Codeforces | Codeforces Round #317 [AimFund Thanks-Round] (Div. 1) | 10 |
| 114 | MUH and Lots and Lots of Segments | Codeforces | Codeforces Round #269 (Div. 2) | 10 |
| 115 | Inna and Babies | Codeforces | Codeforces Round #220 (Div. 2) | 10 |
| 116 | School | Codeforces | School Team Contest #3 (Winter Computer School 2010/11) | 10 |