```
#include<bits/stdc++.h>
using namespace std;
long long n;
int main()
{
cin>>n;
cout<<pow(2,n)-1;
return 0;
}
```
我这个也是60分
by tlsonghangtong @ 2024-04-21 15:32:04
@[yzl0225](/user/1061745)
by tlsonghangtong @ 2024-04-21 15:33:47