Codeforces Beta Round 8 C. Looking for Order
Codeforces Beta Round 2 B. The least round way
Benny and Some Magic
Ways
Fibonacci substring
Monsters in Grid
Edge Destruction
Codeforces Beta Round 15 C. Industrial Nim
Codeforces Beta Round 18 (Div. 2 Only) D. Seller Bob
Codeforces Beta Round 18 (Div. 2 Only) E. Flag 2