50分，请各位大佬斧正

Yxy137 @ 2024-02-15 21:40:02

#include<bits/stdc++.h>
using namespace std;
long long a=1,ans=0;
int main(){
    int n;
    cin>>n;
    for(int i=1;i<=n;i++){
        a=1;
        for(int j=1;j<=i;j++){
            a*=j;
        }
        ans+=a;
    }
    cout<<ans;
}

by xiangzhenze611 @ 2024-02-15 21:42:52

@Yxy137

n \le 50

要用高精度

by xiangzhenze611 @ 2024-02-15 21:43:44

@Yxy137 long long 存不下

by Tubishu @ 2024-02-16 17:18:14

@Yxy137 n太大的时候long long 也存不下了，考虑字符串吧

by Abelxxyy @ 2024-02-20 19:11:15

可以试试double.