Problem A. Can Shahhoud Solve it?
Problem B. Defeat the Monsters
Problem C. UCL Game Night
Problem D. Police Stations
Problem E. Create Your Own Nim Game
Problem F. Nim Cheater
Problem G. Colors Overflow
Problem H. Don’t Ever Ask a Girl for her Codeforces Account
Problem I. Odd and Even Queries
Problem J. Weird Sum
Problem K. Quantum Stones
Problem L. Odd and Even Count
原文：https://www.cnblogs.com/NineSwords/p/9270146.html