Codeforces Round 190 (Div. 1) B. Ciel and Duel
Codeforces Round 191 (Div. 2) D. Block Tower
MemSQL start c up Round 2 - online version B. Palindrome
Codeforces Round 195 (Div. 2) B. Vasily the Bear and Fly
Codeforces Round 199 (Div. 2) C. Cupboard and Balloons
Permutations
Distinct solutions
StellarSeating Maximization
Surveillance
Another Problem