D - Magical Cookies
Codeforces Testing Round 5 B. Dominoes
Codeforces Round 172 (Div. 1) A. Rectangle Puzzle
Croc Champ 2013 - Qualification Round E. Tree-String Problem
Croc Champ 2013 - Round 1 C. Beautiful IP Addresses
Codeforces Round 179 (Div. 2) B. Yaroslav and Two Strings
String Matching
COD love!! [Medium]
ALOVEG!! Easy-Medium
Killjee and subsets