| 1 |
k-Tree |
Codeforces |
|
Codeforces Round #247 (Div. 2) |
1 |
| 2 |
Chocolate |
SPOJ |
|
|
1 |
| 3 |
Xenia and Bit Operations |
Codeforces |
|
Codeforces Round #197 (Div. 2) |
1 |
| 4 |
Kefa and Park |
Codeforces |
|
Codeforces Round #321 (Div. 2) |
1 |
| 5 |
Longest path in a tree |
SPOJ |
|
|
1 |
| 6 |
Party |
Codeforces |
|
Codeforces Beta Round #87 (Div. 1 Only) & Codeforces Beta Round #87 (Div. 2 Only) |
1 |
| 7 |
Nice Binary Trees |
SPOJ |
|
|
1 |
| 8 |
Pashmak and Garden |
Codeforces |
|
Codeforces Round #261 (Div. 2) |
1 |
| 9 |
Timofey and a tree |
Codeforces |
|
Codeforces Round #395 (Div. 1) & Codeforces Round #395 (Div. 2) |
2 |
| 10 |
Reposts |
Codeforces |
|
VK Cup 2015 - Qualification Round 1 |
2 |
| 11 |
Journey |
Codeforces |
|
Codeforces Round #428 (Div. 2) |
2 |
| 12 |
Tree _order |
SPOJ |
|
|
2 |
| 13 |
Bear and Forgotten Tree 3 |
Codeforces |
|
VK Cup 2016 - Round 1 |
2 |
| 14 |
Xor-tree |
Codeforces |
|
Codeforces Round #245 (Div. 1) & Codeforces Round #245 (Div. 2) |
2 |
| 15 |
Binary Search Tree |
UVA |
|
|
2 |
| 16 |
Fibonacci System |
Live Archive |
2008 |
Europe - Northeastern |
2 |
| 17 |
Misha and Forest |
Codeforces |
|
Codeforces Round #285 (Div. 2) & Codeforces Round #285 (Div. 1) |
3 |
| 18 |
Anton and Making Potions |
Codeforces |
|
Codeforces Round #379 (Div. 2) |
3 |
| 19 |
Interesting Array |
Codeforces |
|
Codeforces Round #275 (Div. 1) & Codeforces Round #275 (Div. 2) |
3 |
| 20 |
Valera and Elections |
Codeforces |
|
Codeforces Round #216 (Div. 2) |
3 |
| 21 |
Ants Colony |
UVA |
|
|
3 |
| 22 |
AVL Tree |
SPOJ |
|
|
3 |
| 23 |
Vasiliy's Multiset |
Codeforces |
|
Codeforces Round #367 (Div. 2) |
3 |
| 24 |
Alyona and the Tree |
Codeforces |
|
Codeforces Round #358 (Div. 2) |
3 |
| 25 |
Choosing Capital for Treeland |
Codeforces |
|
Codeforces Round #135 (Div. 2) |
3 |
| 26 |
Distance in Tree |
Codeforces |
|
VK Cup 2012 Round 1 |
3 |
| 27 |
Okabe and Boxes |
Codeforces |
|
Codeforces Round #420 (Div. 2) |
3 |
| 28 |
Appleman and Tree |
Codeforces |
|
Codeforces Round #263 (Div. 1) & Codeforces Round #263 (Div. 2) |
4 |
| 29 |
Closest distance |
SPOJ |
|
|
4 |
| 30 |
Eternal Victory |
Codeforces |
|
Codeforces Beta Round #57 (Div. 2) |
4 |
| 31 |
Lomsat gelral |
Codeforces |
|
Educational Codeforces Round 2 |
4 |
| 32 |
Ciel the Commander |
Codeforces |
|
Codeforces Round #190 (Div. 1) & Codeforces Round #190 (Div. 2) |
4 |
| 33 |
Roads not only in Berland |
Codeforces |
|
Codeforces Beta Round #25 (Div. 2 Only) |
4 |
| 34 |
Count Minimum Spanning Trees |
SPOJ |
|
|
4 |
| 35 |
Xenia and Tree |
Codeforces |
|
Codeforces Round #199 (Div. 2) |
4 |
| 36 |
Zero Tree |
Codeforces |
|
Codeforces Round #168 (Div. 1) & Codeforces Round #168 (Div. 2) |
4 |
| 37 |
Vessels |
Codeforces |
|
Codeforces Round #218 (Div. 2) |
4 |
| 38 |
Chloe and pleasant prizes |
Codeforces |
|
Codeforces Round #384 (Div. 2) |
4 |
| 39 |
Tree Construction |
Codeforces |
|
Codeforces Round #353 (Div. 2) |
4 |
| 40 |
New Year Santa Network |
Codeforces |
|
Good Bye 2014 |
4 |
| 41 |
A Lot of Games |
Codeforces |
|
Codeforces Round #260 (Div. 1) & Codeforces Round #260 (Div. 2) |
4 |
| 42 |
Civilization |
Codeforces |
|
Codeforces Round #260 (Div. 1) & Codeforces Round #260 (Div. 2) |
4 |
| 43 |
Alyona and a tree |
Codeforces |
|
Codeforces Round #381 (Div. 1) & Codeforces Round #381 (Div. 2) |
4 |
| 44 |
Design Tutorial: Inverse the Problem |
Codeforces |
|
Codeforces Round #270 |
4 |
| 45 |
Book of Evil |
Codeforces |
|
Codeforces Round #196 (Div. 2) & Codeforces Round #196 (Div. 1) |
4 |
| 46 |
Fools and Roads |
Codeforces |
|
Codeforces Round #121 (Div. 1) & Codeforces Round #121 (Div. 2) |
4 |
| 47 |
Propagating tree |
Codeforces |
|
Codeforces Round #225 (Div. 1) & Codeforces Round #225 (Div. 2) |
4 |
| 48 |
Ilya And The Tree |
Codeforces |
|
Codeforces Round #430 (Div. 2) |
4 |
| 49 |
Enemy is weak |
Codeforces |
|
Codeforces Beta Round #57 (Div. 2) |
4 |
| 50 |
Connecting Universities |
Codeforces |
|
Codeforces Round #364 (Div. 1) & Codeforces Round #364 (Div. 2) |
4 |
| 51 |
Garland |
Codeforces |
|
Codeforces Round #398 (Div. 2) |
4 |
| 52 |
A and B and Lecture Rooms |
Codeforces |
|
Codeforces Round #294 (Div. 2) |
4 |
| 53 |
Tree Requests |
Codeforces |
|
Codeforces Round #316 (Div. 2) |
4 |
| 54 |
Kay and Snowflake |
Codeforces |
|
Codeforces Round #359 (Div. 1) & Codeforces Round #359 (Div. 2) |
5 |
| 55 |
An overnight dance in discotheque |
Codeforces |
|
Codeforces Round #418 (Div. 2) |
5 |
| 56 |
Sausage Maximization |
Codeforces |
|
Codeforces Round #173 (Div. 2) |
5 |
| 57 |
Tree and Queries |
Codeforces |
|
Codeforces Round #221 (Div. 1) |
5 |
| 58 |
Blood Cousins |
Codeforces |
|
Codeforces Round #130 (Div. 2) |
5 |
| 59 |
Spiders |
Codeforces |
|
School Regional Team Contest, Saratov, 2011 |
5 |
| 60 |
Misha, Grisha and Underground |
Codeforces |
|
Codeforces Round #425 (Div. 2) |
5 |
| 61 |
Vasya and a Tree |
Codeforces |
|
Educational Codeforces Round 54 (Rated for Div. 2) |
5 |
| 62 |
4-point polyline |
Codeforces |
|
MemSQL Start[c]UP 2.0 - Round 1 |
5 |
| 63 |
Running Track |
Codeforces |
|
Codeforces Round #338 (Div. 2) |
5 |
| 64 |
Dungeons and Candies |
Codeforces |
|
Zepto Code Rush 2014 |
5 |
| 65 |
Lucky Tree |
Codeforces |
|
Codeforces Beta Round #84 (Div. 1 Only) & Codeforces Beta Round #84 (Div. 2 Only) |
5 |
| 66 |
Water Tree |
Codeforces |
|
Codeforces Round #200 (Div. 1) |
5 |
| 67 |
Duff in the Army |
Codeforces |
|
Codeforces Round #326 (Div. 1) & Codeforces Round #326 (Div. 2) |
5 |
| 68 |
Exposition |
Codeforces |
|
Codeforces Beta Round #6 (Div. 2 Only) |
5 |
| 69 |
Count on a Treap |
CodeChef |
|
|
5 |
| 70 |
Valid Sets |
Codeforces |
|
Codeforces Round #277 (Div. 2) |
5 |
| 71 |
Petr# |
Codeforces |
|
Codeforces Beta Round #86 (Div. 1 Only) & Codeforces Beta Round #86 (Div. 2 Only) |
5 |
| 72 |
Super M |
Codeforces |
|
Codeforces Round #328 (Div. 2) |
5 |
| 73 |
Pillars |
Codeforces |
|
Codeforces Round #271 (Div. 2) |
5 |
| 74 |
Two Paths |
Codeforces |
|
Codeforces Beta Round #14 (Div. 2) |
5 |
| 75 |
Minimum spanning tree for each edge |
Codeforces |
|
Educational Codeforces Round 3 |
5 |
| 76 |
Cutting Figure |
Codeforces |
|
Codeforces Round #122 (Div. 1) & Codeforces Round #122 (Div. 2) |
5 |
| 77 |
On Changing Tree |
Codeforces |
|
Codeforces Round #232 (Div. 1) & Codeforces Round #232 (Div. 2) |
6 |
| 78 |
Demiurges Play Again |
Codeforces |
|
Codeforces Round #300 |
6 |
| 79 |
Avoiding a disaster |
A2 Online Judge |
|
|
6 |
| 80 |
Caisa and Tree |
Codeforces |
|
Codeforces Round #264 (Div. 2) |
6 |
| 81 |
Gifts by the List |
Codeforces |
|
Codeforces Round #357 (Div. 2) |
6 |
| 82 |
New Year Tree |
Codeforces |
|
Good Bye 2013 |
6 |
| 83 |
WTF? |
Codeforces |
|
April Fools Day Contest 2013 |
6 |
| 84 |
Infinite Inversions |
Codeforces |
|
Codeforces Round #301 (Div. 2) |
6 |
| 85 |
Karen and Supermarket |
Codeforces |
|
Codeforces Round #419 (Div. 1) & Codeforces Round #419 (Div. 2) |
6 |
| 86 |
Information Graph |
Codeforces |
|
Codeforces Round #266 (Div. 2) |
6 |
| 87 |
Ant on the Tree |
Codeforces |
|
Codeforces Beta Round #29 (Div. 2, Codeforces format) |
6 |
| 88 |
Hamiltonian Spanning Tree |
Codeforces |
|
Wunder Fund Round 2016 (Div. 1 + Div. 2 combined) |
6 |
| 89 |
Mahmoud and a xor trip |
Codeforces |
|
Codeforces Round #396 (Div. 2) |
6 |
| 90 |
Road Improvement |
Codeforces |
|
Codeforces Round #302 (Div. 1) |
6 |
| 91 |
Invariance of Tree |
Codeforces |
|
Codeforces Round #319 (Div. 1) & Codeforces Round #319 (Div. 2) |
6 |
| 92 |
Work Group |
Codeforces |
|
VK Cup 2015 - Round 2 (unofficial online mirror, Div. 1 only) |
6 |
| 93 |
Ants in Leaves |
Codeforces |
|
Educational Codeforces Round 7 |
6 |
| 94 |
Apple Tree |
Codeforces |
|
Codeforces Round #202 (Div. 1) & Codeforces Round #202 (Div. 2) |
6 |
| 95 |
Game on Tree |
Codeforces |
|
Codeforces Round #172 (Div. 1) & Codeforces Round #172 (Div. 2) |
6 |
| 96 |
Tree |
A2 Online Judge |
|
|
7 |
| 97 |
Paint Tree |
Codeforces |
|
Codeforces Round #124 (Div. 1) & Codeforces Round #124 (Div. 2) |
7 |
| 98 |
Ann and Half-Palindrome |
Codeforces |
|
Codeforces Round #311 (Div. 2) |
7 |
| 99 |
Big Maximum Sum |
Codeforces |
|
Codeforces Beta Round #67 (Div. 2) |
7 |
| 100 |
Happy Tree Party |
Codeforces |
|
Codeforces Round #329 (Div. 2) |
7 |
| 101 |
Road Improvement |
Codeforces |
|
VK Cup 2016 - Qualification Round 2 |
7 |
| 102 |
Little Elephant and Tree |
Codeforces |
|
Codeforces Round #157 (Div. 1) |
7 |
| 103 |
Black and White Tree |
Codeforces |
|
Codeforces Round #158 (Div. 2) |
7 |
| 104 |
Treeland Tour |
Codeforces |
|
Codeforces Round #279 (Div. 2) |
7 |
| 105 |
Peterson Polyglot |
Codeforces |
|
Codeforces Round #402 (Div. 1) & Codeforces Round #402 (Div. 2) |
7 |
| 106 |
Hill Climbing |
Codeforces |
|
Codeforces Round #238 (Div. 1) |
7 |
| 107 |
Cactus |
Codeforces |
|
Codeforces Round #143 (Div. 2) |
7 |
| 108 |
Beard Graph |
Codeforces |
|
Codeforces Round #112 (Div. 2) |
7 |
| 109 |
Bear and Drawing |
Codeforces |
|
Codeforces Round #318 [RussianCodeCup Thanks-Round] (Div. 1) & Codeforces Round #318 [RussianCodeCup Thanks-Round] (Div. 2) |
7 |
| 110 |
Ralph And His Tour in Binary Country |
Codeforces |
|
Codeforces Round #447 (Div. 2) |
7 |
| 111 |
Famil Door and Roads |
Codeforces |
|
Codeforces Round #343 (Div. 2) |
7 |
| 112 |
Acyclic Organic Compounds |
Codeforces |
|
Codeforces Round #333 (Div. 1) |
7 |
| 113 |
World Eater Brothers |
Codeforces |
|
Codeforces Round #148 (Div. 1) & Codeforces Round #148 (Div. 2) |
7 |
| 114 |
Ksenia and Pawns |
Codeforces |
|
Codeforces Round #224 (Div. 2) |
7 |
| 115 |
Bribes |
Codeforces |
|
Bubble Cup 8 - Finals [Online Mirror] |
7 |
| 116 |
Little Girl and Problem on Trees |
Codeforces |
|
Codeforces Round #169 (Div. 2) |
7 |
| 117 |
Old Berland Language |
Codeforces |
|
Codeforces Beta Round #37 |
7 |
| 118 |
Gift |
Codeforces |
|
All-Ukrainian School Olympiad in Informatics |
7 |
| 119 |
New Roads |
Codeforces |
|
Codeforces Round #386 (Div. 2) |
7 |
| 120 |
Blood Cousins Return |
Codeforces |
|
Codeforces Round #151 (Div. 2) |
7 |
| 121 |
Guess the Tree |
Codeforces |
|
Codeforces Round #245 (Div. 1) & Codeforces Round #245 (Div. 2) |
7 |
| 122 |
Case of Computer Network |
Codeforces |
|
Codeforces Round #310 (Div. 1) |
7 |
| 123 |
Iahub and Xors |
Codeforces |
|
Codeforces Round #198 (Div. 1) |
7 |
| 124 |
Beavermuncher-0xFF |
Codeforces |
|
Codeforces Beta Round #69 (Div. 1 Only) & Codeforces Beta Round #69 (Div. 2 Only) |
7 |
| 125 |
Inna and Sequence |
Codeforces |
|
Codeforces Round #220 (Div. 2) |
7 |
| 126 |
Pursuit For Artifacts |
Codeforces |
|
Educational Codeforces Round 10 |
7 |
| 127 |
Divisor Tree |
Codeforces |
|
Codeforces Round #196 (Div. 2) & Codeforces Round #196 (Div. 1) |
7 |
| 128 |
Tourists |
Codeforces |
|
Codeforces Round #278 (Div. 1) |
8 |
| 129 |
Preorder Test |
Codeforces |
|
8VC Venture Cup 2016 - Final Round |
8 |
| 130 |
Balance |
Codeforces |
|
Codeforces Round #188 (Div. 1) & Codeforces Round #188 (Div. 2) |
8 |
| 131 |
e-Government |
Codeforces |
|
VK Cup 2012 Round 2 |
8 |
| 132 |
Arpa’s letter-marked tree and Mehrdad’s Dokhtar-kosh paths |
Codeforces |
|
Codeforces Round #383 (Div. 1) |
8 |
| 133 |
Scheme |
Codeforces |
|
Codeforces Beta Round #22 (Div. 2 Only) |
8 |
| 134 |
DZY Loves Planting |
Codeforces |
|
Codeforces Round #254 (Div. 1) |
8 |
| 135 |
Kingdom and its Cities |
Codeforces |
|
Codeforces Round #339 (Div. 1) |
8 |
| 136 |
Polo the Penguin and Trees |
Codeforces |
|
Codeforces Round #177 (Div. 1) |
8 |
| 137 |
Matching Names |
Codeforces |
|
VK Cup 2015 - Finals, online mirror |
8 |
| 138 |
Petya and Tree |
Codeforces |
|
Yandex.Algorithm 2011 Round 1 |
8 |
| 139 |
Castle |
Codeforces |
|
Codeforces Beta Round #79 (Div. 1 Only) |
8 |
| 140 |
Zublicanes and Mumocrates |
Codeforces |
|
Codeforces Round #322 (Div. 2) |
8 |
| 141 |
IT Restaurants |
Codeforces |
|
VK Cup 2012 Finals (unofficial online-version) |
8 |
| 142 |
Birthday |
Codeforces |
|
Codeforces Round #282 (Div. 1) |
8 |
| 143 |
Archaeology |
Codeforces |
|
Croc Champ 2012 - Round 2 |
8 |
| 144 |
Genetic engineering |
Codeforces |
|
Yandex.Algorithm 2011 Round 2 |
8 |
| 145 |
Close Vertices |
Codeforces |
|
Croc Champ 2013 - Round 2 |
8 |
| 146 |
Drazil and Morning Exercise |
Codeforces |
|
Codeforces Round #292 (Div. 1) |
8 |
| 147 |
Magic Matrix |
Codeforces |
|
Educational Codeforces Round 9 |
8 |
| 148 |
Choosing Subtree is Fun |
Codeforces |
|
Codeforces Round #219 (Div. 1) |
8 |
| 149 |
Thwarting Demonstrations |
Codeforces |
|
Codeforces Round #121 (Div. 1) |
8 |
| 150 |
Beautiful Road |
Codeforces |
|
Codeforces Beta Round #73 (Div. 1 Only) |
8 |
| 151 |
Shaass the Great |
Codeforces |
|
Codeforces Round #178 (Div. 2) |
8 |
| 152 |
Adam and Tree |
Codeforces |
|
Codeforces Round #253 (Div. 1) |
8 |
| 153 |
The Chocolate Spree |
Codeforces |
|
Manthan, Codefest 16 |
8 |
| 154 |
Tavas on the Path |
Codeforces |
|
Codeforces Round #299 (Div. 1) |
9 |
| 155 |
Singer House |
Codeforces |
|
Codeforces Round #424 (Div. 1, rated, based on VK Cup Finals) |
9 |
| 156 |
Caterpillar |
Codeforces |
|
Codeforces Beta Round #48 |
9 |
| 157 |
Pilgrims |
Codeforces |
|
Codeforces Round #202 (Div. 1) |
9 |
| 158 |
Noble Knight's Path |
Codeforces |
|
Codeforces Round #140 (Div. 1) |
9 |
| 159 |
Pairs |
Codeforces |
|
Yandex.Algorithm Open 2011 Qualification 1 |
9 |
| 160 |
Random Function and Tree |
Codeforces |
|
Codeforces Round #275 (Div. 1) |
9 |
| 161 |
Timofey and a flat tree |
Codeforces |
|
Codeforces Round #395 (Div. 1) |
9 |
| 162 |
Big Problems for Organizers |
Codeforces |
|
RCC 2014 Warmup (Div. 1) |
9 |
| 163 |
Information Reform |
Codeforces |
|
Codeforces Beta Round #64 |
9 |
| 164 |
Freezing with Style |
Codeforces |
|
Codeforces Round #107 (Div. 1) |
9 |
| 165 |
Fox And Travelling |
Codeforces |
|
Codeforces Round #290 (Div. 1) |
9 |
| 166 |
Maze |
Codeforces |
|
Codeforces Beta Round #92 (Div. 1 Only) |
9 |
| 167 |
Surprise me! |
Codeforces |
|
Codeforces Round #415 (Div. 1) |
9 |
| 168 |
Alien DNA |
Codeforces |
|
Codeforces Round #134 (Div. 1) |
9 |
| 169 |
Garden |
Codeforces |
|
Codeforces Round #108 (Div. 2) |
9 |
| 170 |
Berland Federalization |
Codeforces |
|
Testing Round #10 |
9 |
| 171 |
Pastoral Oddities |
Codeforces |
|
Codeforces Round #334 (Div. 1) |
9 |
| 172 |
Arkady and a Nobody-men |
Codeforces |
|
Codeforces Round #434 (Div. 1, based on Technocup 2018 Elimination Round 1) |
9 |
| 173 |
Clockwork Bomb |
Codeforces |
|
Codeforces Round #345 (Div. 1) |
9 |
| 174 |
Mirror Box |
Codeforces |
|
Codeforces Round #320 (Div. 1) [Bayan Thanks-Round] |
10 |
| 175 |
Leaders |
Codeforces |
|
Yandex.Algorithm 2011 Finals |
10 |
| 176 |
Tree or not Tree |
Codeforces |
|
Codeforces Beta Round #88 |
10 |
| 177 |
Perpetual Motion Machine |
Codeforces |
|
Codeforces Round #424 (Div. 1, rated, based on VK Cup Finals) |
10 |
| 178 |
Tree and XOR |
Codeforces |
|
Mail.Ru Cup 2018 Round 2 |
10 |
| 179 |
Help King |
Codeforces |
|
Codeforces Beta Round #78 (Div. 1 Only) & Codeforces Beta Round #78 (Div. 2 Only) |
10 |
| 180 |
Campus |
Codeforces |
|
Codeforces Round #317 [AimFund Thanks-Round] (Div. 1) |
10 |
| 181 |
Nikita and game |
Codeforces |
|
Codeforces Round #430 (Div. 2) |
10 |
| 182 |
Misha and LCP on Tree |
Codeforces |
|
Codeforces Round #285 (Div. 1) |
10 |
| 183 |
Restore the Tree |
Codeforces |
|
Codeforces Round #440 (Div. 1, based on Technocup 2018 Elimination Round 2) |
10 |
| 184 |
Island Puzzle |
Codeforces |
|
8VC Venture Cup 2016 - Final Round |
10 |
| 185 |
Furukawa Nagisa's Tree |
Codeforces |
|
Codeforces Round #248 (Div. 1) |
10 |
| 186 |
Spiders Evil Plan |
Codeforces |
|
ZeptoLab Code Rush 2015 |
10 |
| 187 |
Iron Man |
Codeforces |
|
Codeforces Round #366 (Div. 1) |
10 |
| 188 |
In a Trap |
Codeforces |
|
Codeforces Round #429 (Div. 1) |
10 |
| 189 |
Escaping on Beaveractor |
Codeforces |
|
ABBYY Cup 3.0 - Finals (online version) |
10 |
| 190 |
Logistical Questions |
Codeforces |
|
VK Cup 2015 - Finals, online mirror |
10 |
| 191 |
Berland Miners |
Codeforces |
|
VK Cup 2015 - Round 2 (unofficial online mirror, Div. 1 only) |
10 |
| 192 |
ELCA |
Codeforces |
|
Codeforces Round #275 (Div. 1) |
10 |
| 193 |
Red-Black Cobweb |
Codeforces |
|
Codeforces Round #426 (Div. 1) |
10 |
| 194 |
Bear and Chemistry |
Codeforces |
|
VK Cup 2016 - Round 1 |
10 |
| 195 |
Sloth |
Codeforces |
|
Codeforces Round #446 (Div. 1) |
10 |
| 196 |
Restoring Map |
Codeforces |
|
VK Cup 2015 - Finals, online mirror |
10 |
| 197 |
New Year Running |
Codeforces |
|
Good Bye 2014 |
10 |
| 198 |
Galaxy Union |
Codeforces |
|
School Personal Contest #3 (Winter Computer School 2010/11) - Codeforces Beta Round #45 (ACM-ICPC Rules) |
10 |
| 199 |
An easy problem about trees |
Codeforces |
|
MemSQL Start[c]UP 2.0 - Round 2 |
10 |
| 200 |
Rap God |
Codeforces |
|
Codeforces Round #406 (Div. 1) |
10 |
| 201 |
ALT |
Codeforces |
|
Codeforces Round #406 (Div. 1) |
10 |
| 202 |
Tree and Table |
Codeforces |
|
Codeforces Round #153 (Div. 1) |
10 |