Pairs With Given Xor
Snake Ladder Problem!
Chef and Time Machine
Marbles
Little Elephant and Divisors
Team Formation
Matchsticks
Codeforces Round #726 (Div. 2) E2. Erase and Extend (Hard Version)
Codeforces Round #726 (Div. 2) E1. Erase and Extend (Easy Version)
Codeforces Round #727 (Div. 2) D. PriceFixed