292. Nim Game

static int wing=[]()
{
    std::ios::sync_with_stdio(false);
    cin.tie(NULL);
    return 0;
}();

class Solution 
{
public:
    bool canWinNim(int n) 
    {
        return n%4;
    }
};

只要石头数量不是4的倍数就能赢