Nim取子游戏是由两个人面对若干堆硬币（或石子）进行的游戏。设有k> 1堆硬币，各堆分别含有N1，N2，……NK枚硬币。游戏的目的就是选择最后剩下的硬币。游戏法则如下：



1．两个游戏人交替进行游戏（游戏人I和游戏人II）；



2．当轮到每个游戏人取子时，选择这些堆中的一堆，并从所选的堆中取走至少一枚硬币（游戏人可以取走他所选堆中的全部硬币）；



3．当所有的堆都变成空堆时，最后取子的游戏人即为胜者。-Nim game is to take the child by two people face a number of heap of coins (or stones) in a game. With k>　　1 stack of coins, each stack containing respectively N1, N2, ...... NK coins. The purpose of the game is to choose the last remaining coins. Rules of the game are as follows: 1. Game two people alternately games (games and people who I II)　2. When it came time to take each game one at midnight, choose a bunch of these heap, and remove at least one coin　the selected stack (one can take his game all the selected coin stack)　3. When all have become empty heap heap, the final game to take the child who is the winner.