#include <iostream>
using namespace std;
int g(int m, int n, int x) {
int ans = 0;
int i;
if (n == 1)
return 1;
for (i = x; i <= m / n; i++)
ans += g(m - i, n - 1, i);
return ans;
}
int main( ) {
int t, m, n;
cin >> m >> n;
cout << g(m, n, 0) << endl;
return 0;
} 输入：8 4输出：___1______
