题解 | #放苹果#
放苹果
https://www.nowcoder.com/practice/4f0c1e21010e4d849bde5297148e81d9
#include<iostream>
using namespace std;
int m,n;
int dfs(int u,int sum,int last)
{
if(u == n){
if(sum == 0) return 1;
else return 0;
}
int res = 0;
for(int i = last;i <= sum;i++)
{
res += dfs(u + 1,sum - i,i);
}
return res;
}
int main(void)
{
cin >> m >> n;
cout << dfs(0,m,0) << endl;
return 0;
}
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