#include <iostream>

using namespace std;
long long f(long long n,long long m)
{
    if(n==0||m==0)
        return 1;
    if(n!=0&&m!=0) return f(n-1,m)+f(n,m-1);
}
int main()
{
    long long n,m;
    while(cin>>n>>m)
    {
        if(n==0&&m==0)
            break;
        else cout<<f(n,m)<<endl;
    }
    return 0;
}

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• Re:为什么用递推不对呀~~Runtime Error (59) a445116 2020-01-19 11:19:46