C++ 代码

class Solution {
public:
    int clumsy(int N) {
        if (N == 1) return 1;
        if (N == 2) return 2;
        if (N == 3) return 6;
        if (N == 4) return 7;
        if (N % 4 == 0) return N + 1;
        if (N % 4 == 1) return N + 2;
        if (N % 4 == 2) return N + 2;
        return N - 1;
    }
};