1 
P1  Bear and Big Brother 
Codeforces 
Codeforces Round #405 (rated, Div. 2, based on VK Cup 2017 Round 1) 
2 
P2  Team 
Codeforces 
Codeforces Round #143 (Div. 2) 
3 
P3  Beautiful Matrix 
Codeforces 
Codeforces Round #161 (Div. 2) 
4 
P4  Gravity Flip 
Codeforces 
Codeforces Round #238 (Div. 2) 
5 
P5  Petya and Strings 
Codeforces 
Codeforces Beta Round #85 (Div. 2 Only) 
6 
P6  Boy or Girl 
Codeforces 
Codeforces Round #146 (Div. 2) 
7 
P7  Word 
Codeforces 
Codeforces Beta Round #55 (Div. 2) 
8 
P8  Word Capitalization 
Codeforces 
Codeforces Round #172 (Div. 2) 
9 
P9  Magnets 
Codeforces 
Codeforces Round #200 (Div. 2) 
10 
P10  Sereja and Dima 
Codeforces 
Codeforces Round #223 (Div. 2) 
11 
P11  Stones on the Table 
Codeforces 
Codeforces Round #163 (Div. 2) 
12 
P12  Police Recruits 
Codeforces 
Codeforces Round #244 (Div. 2) 
13 
P13  Black Square 
Codeforces 
Codeforces Round #247 (Div. 2) 
14 
P14  Night at the Museum 
Codeforces 
Codeforces Round #376 (Div. 2) 
15 
P15  Games 
Codeforces 
Codeforces Round #164 (Div. 2) 
16 
P16  Buy a Shovel 
Codeforces 
Codeforces Round #377 (Div. 2) 
17 
P17  Is your horseshoe on the other hoof? 
Codeforces 
Codeforces Round #141 (Div. 2) 
18 
P18  Colorful Stones (Simplified Edition) 
Codeforces 
Codeforces Round #162 (Div. 2) 
19 
P19  Die Roll 
Codeforces 
Codeforces Beta Round #9 (Div. 2 Only) 
20 
P20  Shaass and Oskols 
Codeforces 
Codeforces Round #178 (Div. 2) 
21 
P21  Juicer 
Codeforces 
AIM Tech Round 3 (Div. 2) 
22 
P22  Carrot Cakes 
Codeforces 
Playrix Codescapes Cup (Codeforces Round #413, rated, Div. 1 + Div. 2) 
23 
P23  Anton and Letters 
Codeforces 
Codeforces Round #253 (Div. 2) 
24 
P24  Way Too Long Words 
Codeforces 
Codeforces Beta Round #65 (Div. 2) 
25 
P25  Free Ice Cream 
Codeforces 
Codeforces Round #359 (Div. 2) 
26 
P26  Helpful Maths 
Codeforces 
Codeforces Round #197 (Div. 2) 
27 
P27  Team Olympiad 
Codeforces 
Codeforces Round #279 (Div. 2) 
28 
P28  New Password 
Codeforces 
VK Cup 2017  Qualification 2 
29 
P29  Next Round 
Codeforces 
VK Cup 2012 Qualification Round 1 
30 
P30  Is it rated? 
Codeforces 
Codeforces Round #412 (rated, Div. 2, base on VK Cup 2017 Round 3) 
31 
P31  Beautiful Year 
Codeforces 
Codeforces Round #166 (Div. 2) 
32 
P32  Subprime 
UVA 

33 
P33  Burger Time? 
UVA 
