为啥全mle??????

#include <bits/stdc++.h>
using namespace std;
int akm(int s, int d)
{
	if(d == 0)
	{
		return d+1;
	}
	if(s == 0)
	{
		return akm(s - 1,1);
	}
	return akm(s-1,akm(s,d-1));
}
int main()
{
	int n, m;
	cin >> n >> m;
	cout << akm(n, m);
}