This game starts with a positive integer. Two players take turns to remove a single digit from that integer. After the digit is removed any resulting leading zeros are removed.
For example, removing a digit from
The winner is the person who removes the last nonzero digit.
Define
Find
现有一个正整数,两位玩家轮流从该整数中移除一个数位并删去因此产生的任何前导零。
例如,从
移走最后一个非零数位的玩家获胜。
我们记
求
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