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#Errichto problems
Problem Name Online Judge Contest Difficulty Level
1 Bear and Big Brother Categories Codeforces Codeforces Round #405 (rated, Div. 2, based on VK Cup 2017 Round 1) 1
2 Bear and Five Cards Categories Codeforces Codeforces Round #356 (Div. 2) 1
3 New Year and Hurry Categories Codeforces Good Bye 2016 1
4 Vacations Categories Codeforces Codeforces Round #363 (Div. 1) & Codeforces Round #363 (Div. 2) 1
5 New Year and North Pole Categories Codeforces Good Bye 2016 1
6 Bear and Elections Categories Codeforces Codeforces Round #318 [RussianCodeCup Thanks-Round] (Div. 2) 1
7 New Year and Days Categories Codeforces Good Bye 2015 1
8 Launch of Collider Categories Codeforces Codeforces Round #363 (Div. 2) 1
9 Bear and Poker Categories Codeforces Codeforces Round #318 [RussianCodeCup Thanks-Round] (Div. 1) & Codeforces Round #318 [RussianCodeCup Thanks-Round] (Div. 2) 1
10 Bear and Finding Criminals Categories Codeforces Codeforces Round #356 (Div. 2) 1
11 Bear and Forgotten Tree 3 Categories Codeforces VK Cup 2016 - Round 1 2
12 Bear and Prime 100 Categories Codeforces Codeforces Round #356 (Div. 1) & Codeforces Round #356 (Div. 2) 2
13 New Year and Domino Categories Codeforces Good Bye 2015 2
14 Bear and Three Balls Categories Codeforces IndiaHacks 2016 - Online Edition (Div. 1 + Div. 2) 2
15 Bear and Game Categories Codeforces Codeforces Round #351 (VK Cup 2016 Round 3, Div. 2 Edition) 2
16 Bear and Different Names Categories Codeforces VK Cup 2017 - Round 1 2
17 New Year and Rating Categories Codeforces Good Bye 2016 2
18 Bear and Displayed Friends Categories Codeforces VK Cup 2016 - Round 1 2
19 Bear and Three Musketeers Categories Codeforces Codeforces Round #318 [RussianCodeCup Thanks-Round] (Div. 2) 2
20 New Year and Old Property Categories Codeforces Good Bye 2015 2
21 Bear and Friendship Condition Categories Codeforces VK Cup 2017 - Round 1 2
22 One Bomb Categories Codeforces Codeforces Round #363 (Div. 2) 2
23 Bear and String Distance Categories Codeforces Educational Codeforces Round 8 3
24 Bear and Colors Categories Codeforces VK Cup 2016 - Round 3 3
25 Bear and Blocks Categories Codeforces Codeforces Round #318 [RussianCodeCup Thanks-Round] (Div. 1) & Codeforces Round #318 [RussianCodeCup Thanks-Round] (Div. 2) 3
26 Fix a Tree Categories Codeforces Codeforces Round #363 (Div. 1) & Codeforces Round #363 (Div. 2) 3
27 Bear and Compressing Categories Codeforces IndiaHacks 2016 - Online Edition (Div. 1 + Div. 2) 3
28 Bear and Reverse Radewoosh Categories Codeforces VK Cup 2016 - Round 1 (Div. 2 Edition) 3
29 Problems for Round Categories Codeforces Codeforces Round #351 (VK Cup 2016 Round 3, Div. 2 Edition) 4
30 Bear and Two Paths Categories Codeforces VK Cup 2016 - Round 3 4
31 New Year and Fireworks Categories Codeforces Good Bye 2016 4
32 New Year and Ancient Prophecy Categories Codeforces Good Bye 2015 5
33 Bear and Tree Jumps Categories Codeforces VK Cup 2017 - Round 1 5
34 Bear and Tower of Cubes Categories Codeforces Codeforces Round #356 (Div. 1) & Codeforces Round #356 (Div. 2) 5
35 Contest Balloons Categories Codeforces Canada Cup 2016 5
36 Board Game Categories Codeforces VK Cup 2015 - Round 2 (unofficial online mirror, Div. 1 only) 5
37 Correcting Mistakes Categories Codeforces VK Cup 2015 - Round 2 (unofficial online mirror, Div. 1 only) 5
38 Delivery Bears Categories Codeforces IndiaHacks 2016 - Online Edition (Div. 1 + Div. 2) 6
39 Bear and Polynomials Categories Codeforces VK Cup 2016 - Round 1 6
40 Work Group Categories Codeforces VK Cup 2015 - Round 2 (unofficial online mirror, Div. 1 only) 6
41 Bear and Up-Down Categories Codeforces IndiaHacks 2016 - Online Edition (Div. 1 + Div. 2) 6
42 New Year and Three Musketeers Categories Codeforces Good Bye 2015 7
43 LRU Categories Codeforces Codeforces Round #363 (Div. 1) & Codeforces Round #363 (Div. 2) 7
44 Bear and Forgotten Tree 2 Categories Codeforces IndiaHacks 2016 - Online Edition (Div. 1 + Div. 2) 7
45 Bear and Drawing Categories Codeforces Codeforces Round #318 [RussianCodeCup Thanks-Round] (Div. 1) & Codeforces Round #318 [RussianCodeCup Thanks-Round] (Div. 2) 7
46 Bear and Contribution Categories Codeforces VK Cup 2016 - Round 1 7
47 New Year and Old Subsequence Categories Codeforces Good Bye 2016 7
48 Bear and Company Categories Codeforces VK Cup 2017 - Round 1 7
49 Levels and Regions Categories Codeforces VK Cup 2016 - Round 3 7
50 Bear and Square Grid Categories Codeforces Codeforces Round #356 (Div. 1) & Codeforces Round #356 (Div. 2) 7
51 Encoding Categories Codeforces VK Cup 2015 - Round 2 (unofficial online mirror, Div. 1 only) 7
52 Bear and Bowling 4 Categories Codeforces Educational Codeforces Round 11 8
53 Paper task Categories Codeforces IndiaHacks 2016 - Online Edition (Div. 1 + Div. 2) 8
54 New Year and Cleaning Categories Codeforces Good Bye 2015 8
55 Bear and Cavalry Categories Codeforces Codeforces Round #318 [RussianCodeCup Thanks-Round] (Div. 1) 9
56 Limak and Shooting Points Categories Codeforces Codeforces Round #363 (Div. 1) & Codeforces Round #363 (Div. 2) 9
57 Bear and Paradox Categories Codeforces VK Cup 2016 - Round 1 9
58 Bear and Destroying Subtrees Categories Codeforces VK Cup 2016 - Round 3 9
59 Bear and Chase Categories Codeforces Codeforces Round #356 (Div. 1) 9
60 Move by Prime Categories Codeforces IndiaHacks 2016 - Online Edition (Div. 1 + Div. 2) 9
61 Bear and Bad Powers of 42 Categories Codeforces Codeforces Round #356 (Div. 1) 9
62 Bear and Fair Set Categories Codeforces Educational Codeforces Round 8 9
63 New Year and Finding Roots Categories Codeforces Good Bye 2016 9
64 Cron Categories Codeforces Codeforces Round #363 (Div. 1) 10
65 New Year and Forgotten Tree Categories Codeforces Good Bye 2015 10
66 Berland Miners Categories Codeforces VK Cup 2015 - Round 2 (unofficial online mirror, Div. 1 only) 10
67 Coprime Permutation Categories Codeforces Codeforces Round #363 (Div. 1) 10
68 Bear and Chemistry Categories Codeforces VK Cup 2016 - Round 1 10
69 New Year and Binary Tree Paths Categories Codeforces Good Bye 2016 10
70 New Year and Snowy Grid Categories Codeforces Good Bye 2016 10
71 Bears and Juice Categories Codeforces VK Cup 2016 - Round 3 10
72 Bear and Rectangle Strips Categories Codeforces VK Cup 2017 - Round 1 10
73 Bear and Isomorphic Points Categories Codeforces VK Cup 2017 - Round 1 10
74 Bearish Fanpages Categories Codeforces VK Cup 2016 - Round 3 10
75 New Year and Cake Categories Codeforces Good Bye 2015 10
76 Choosing Ads Categories Codeforces VK Cup 2016 - Round 3 10
77 Landmarks Categories Codeforces VK Cup 2015 - Round 2 (unofficial online mirror, Div. 1 only) 10
78 Bear and Bowling Categories Codeforces Codeforces Round #318 [RussianCodeCup Thanks-Round] (Div. 1) 10