mirror of
https://git.sb/baoshuo/OI-codes.git
synced 2024-09-20 01:05:24 +00:00
18 lines
228 B
C++
18 lines
228 B
C++
// R38781374
|
|
|
|
#include <bits/stdc++.h>
|
|
|
|
using namespace std;
|
|
|
|
int main() {
|
|
int n, sum;
|
|
sum = 1;
|
|
cin >> n;
|
|
for (int i = n - 1; i > 0; i--) {
|
|
sum++;
|
|
sum *= 2;
|
|
}
|
|
cout << sum;
|
|
return 0;
|
|
}
|