Losing Nim
Meow
Suffix Flip
Codeforces Beta Round 63 (Div. 2) E. Subsegments
Unknown Language Round 2 E. Ali goes shopping
Codeforces Beta Round 66 C. LionAge II
Codeforces Beta Round 69 (Div. 1 Only) B. Falling Anvils
Codeforces Beta Round 71 C. Beaver
Odd Divisor Count
Numbers Tournament