#include<iostream>
using namespace std;
int main() {
int sum=0,i=1,m=1;
int n,j;
cout<<"Please enter n:";
cin>>n;
for (i=1;i<=n;i++) {
while (j<=i) {
j=1;
m=m*j;
j++;
}
sum=sum+m;
}
cout<<"The result is:"<<sum<<endl;
return 0;
}