题目: |
#include <iostream>
using namespace std;
int n, m;
int findans(int n, int m) {
if (n == 0) return m;
if (m == 0) return n % 3;
return findans(n - 1, m) - findans(n, m - 1) + findans(n - 1, m - 1);
}
int main() {
cin >> n >> m;
cout << findans(n, m) << endl;
return 0;
}
输入:5 6
输出: 输出:8
|