Find the sum of factorials, and follow up (simple)

#include<iostream>
using namespace std;
int main()
{
    
    int n;
long long s=1,sum=0;
cin >>n ;
for(int i=1;i<=n;i++)
{
    
    
s*=i;
sum+=s;
}
cout <<sum<< endl;
return 0;
}