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divide and conquer problems
Problem Name Online Judge Contest Difficulty Level
1 Equivalent Strings Categories Codeforces Codeforces Round #313 (Div. 1) & Codeforces Round #313 (Div. 2) 2
2 Pashmak and Parmida's problem Categories Codeforces Codeforces Round #261 (Div. 2) 3
3 Distance in Tree Categories Codeforces VK Cup 2012 Round 1 3
4 Painting Fence Categories Codeforces Codeforces Round #256 (Div. 2) 3
5 Book of Evil Categories Codeforces Codeforces Round #196 (Div. 2) & Codeforces Round #196 (Div. 1) 4
6 Xenia and Tree Categories Codeforces Codeforces Round #199 (Div. 2) 4
7 Ciel the Commander Categories Codeforces Codeforces Round #190 (Div. 1) & Codeforces Round #190 (Div. 2) 4
8 Permutations Categories Codeforces Rockethon 2015 4
9 Points on Plane Categories Codeforces Codeforces Round #319 (Div. 1) & Codeforces Round #319 (Div. 2) 5
10 Mashmokh and Reverse Operation Categories Codeforces Codeforces Round #240 (Div. 1) & Codeforces Round #240 (Div. 2) 5
11 How many trees? Categories Codeforces Codeforces Beta Round #9 (Div. 2 Only) 5
12 Counting Rectangles is Fun Categories Codeforces Codeforces Round #219 (Div. 1) & Codeforces Round #219 (Div. 2) 5
13 Tricky Function Categories Codeforces Codeforces Round #245 (Div. 1) 5
14 New Year Tree Categories Codeforces Good Bye 2013 6
15 Practice Categories Codeforces Codeforces Round #145 (Div. 2, ACM-ICPC Rules) & Codeforces Round #145 (Div. 1, ACM-ICPC Rules) 6
16 Hongcow's Game Categories Codeforces Codeforces Round #385 (Div. 1) & Codeforces Round #385 (Div. 2) 6
17 Ciel and Gondolas Categories Codeforces Codeforces Round #190 (Div. 1) 6
18 Beautiful Subarrays Categories Codeforces Educational Codeforces Round 12 7
19 Package Delivery Categories Codeforces 8VC Venture Cup 2016 - Final Round 7
20 Till I Collapse Categories Codeforces Codeforces Round #406 (Div. 1) & Codeforces Round #406 (Div. 2) 7
21 Thief in a Shop Categories Codeforces Educational Codeforces Round 9 7
22 Fairy Categories Codeforces Codeforces Beta Round #19 7
23 Building Bridge Categories Codeforces CROC-MBTU 2012, Final Round (Online version, Div. 2) 7
24 Digit Tree Categories Codeforces Codeforces Round #372 (Div. 1) & Codeforces Round #372 (Div. 2) 7
25 Paint Tree Categories Codeforces Codeforces Round #124 (Div. 1) & Codeforces Round #124 (Div. 2) 7
26 Nanami's Digital Board Categories Codeforces Codeforces Round #248 (Div. 2) & Codeforces Round #248 (Div. 1) 7
27 Minimum Sum Categories Codeforces School Regional Team Contest, Saratov, 2011 7
28 Binary Table Categories Codeforces CROC 2016 - Final Round [Private, For Onsite Finalists Only] 7
29 Pudding Monsters Categories Codeforces ZeptoLab Code Rush 2015 8
30 Abracadabra Categories Codeforces VK Cup 2012 Round 1 8
31 Permutation Categories Codeforces MemSQL Start[c]UP 2.0 - Round 1 8
32 Vowels Categories Codeforces Codeforces Round #225 (Div. 1) 8
33 The Child and Binary Tree Categories Codeforces Codeforces Round #250 (Div. 1) 8
34 Close Vertices Categories Codeforces Croc Champ 2013 - Round 2 8
35 Magic Matrix Categories Codeforces Educational Codeforces Round 9 8
36 Yura and Developers Categories Codeforces Looksery Cup 2015 8
37 One-Based Arithmetic Categories Codeforces Testing Round #10 8
38 Goodbye Souvenir Categories Codeforces Codeforces Round #431 (Div. 1) & Codeforces Round #431 (Div. 2) 8
39 Superset Categories Codeforces Yandex.Algorithm 2011 Finals 8
40 Kingdom and its Cities Categories Codeforces Codeforces Round #339 (Div. 1) 8
41 Find a car Categories Codeforces Codeforces Round #415 (Div. 1) & Codeforces Round #415 (Div. 2) 8
42 Quick Tortoise Categories Codeforces Codeforces Round #144 (Div. 1) 9
43 Candies and Stones Categories Codeforces Codeforces Beta Round #79 (Div. 1 Only) 9
44 Bear and Cavalry Categories Codeforces Codeforces Round #318 [RussianCodeCup Thanks-Round] (Div. 1) 9
45 Parking Lot Categories Codeforces Codeforces Round #274 (Div. 1) 9
46 Formurosa Categories Codeforces Codeforces Round #134 (Div. 1) & Codeforces Round #134 (Div. 2) 9
47 Not Quick Transformation Categories Codeforces Codeforces Beta Round #88 9
48 Tavas on the Path Categories Codeforces Codeforces Round #299 (Div. 1) 9
49 Pumping Stations Categories Codeforces Codeforces Round #200 (Div. 1) 9
50 New Year Shopping Categories Codeforces Good Bye 2014 9
51 Polycarp's Masterpiece Categories Codeforces 2015-2016 ACM-ICPC, NEERC, Southern Subregional Contest (Online Mirror, ACM-ICPC Rules, Teams Preferred) 9
52 Maze 2D Categories Codeforces Coder-Strike 2014 - Round 2 9
53 Half-decay tree Categories Codeforces Codeforces Beta Round #62 9
54 Fox And Polygon Categories Codeforces Codeforces Round #290 (Div. 1) 9
55 Pastoral Oddities Categories Codeforces Codeforces Round #334 (Div. 1) 9
56 Surprise me! Categories Codeforces Codeforces Round #415 (Div. 1) 9
57 Freezing with Style Categories Codeforces Codeforces Round #107 (Div. 1) 9
58 Logistical Questions Categories Codeforces VK Cup 2015 - Finals, online mirror 10
59 Wizards and Roads Categories Codeforces Codeforces Round #114 (Div. 1) 10
60 Finding lines Categories Codeforces Codeforces Round #407 (Div. 1) 10
61 Furukawa Nagisa's Tree Categories Codeforces Codeforces Round #248 (Div. 1) 10
62 Red-Black Cobweb Categories Codeforces Codeforces Round #426 (Div. 1) 10
63 Tree or not Tree Categories Codeforces Codeforces Beta Round #88 10
64 Empty Rectangles Categories Codeforces Codeforces Round #213 (Div. 1) 10
65 Nikita and game Categories Codeforces Codeforces Round #430 (Div. 2) 10
66 Doe Graphs Categories Codeforces Codeforces Round #144 (Div. 1) & Codeforces Round #144 (Div. 2) 10