class Solution {
public:
    bool canWinNim(int n) {
        if (n % 4 == 0)
            return false;
        else 
            return true;

    }
};

Runtime: 0 ms

public class Solution {
    public boolean canWinNim(int n) {
       if(n%4==0){
            return false;
            }else{
            return true;
            }

    }
}

Runtime: 0 ms

解释：
https://leetcode.com/discuss/106718/java-explanation-code