阅读程序写结果:
#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