偶尔复习的时候刷刷，SG函数我老是学一次忘一次……
HDU 1848
POJ 2234 Matches Game
HDU 4388 Stone Game II
POJ 2975 Nim
HDU 1367 A Stone Game
POJ 2505 A multiplication game
ZJU 3057 beans game
POJ 1067 取石子游戏
POJ 2484 A Funny Game
POJ 2425 A Chess Game
POJ 2960 S-Nim
POJ 1704 Georgia and Bob
POJ 1740 A New Stone Game
POJ 2068 Nim
POJ 3480 John
POJ 2348 Euclid's Game
HDU 2645 WNim
POJ 3710 Christmas Game
POJ 3533 Light Switching Game
Codeforces: 603c 850c 768e 317d 305e