已会，要开long long
```
#include<bits/stdc++.h>
using namespace std;
long long x,n,sum=1;
int main(){
scanf("%lld",&x);
scanf("%lld",&n);
for(int i=1;i<=n;i++){
sum=sum+sum*x;
}
printf("%lld",sum);
return 0;
}
//十年OI一场空，不开long long见祖宗
by a1Ex999 @ 2024-07-10 10:24:54