#include<bits/stdc++.h>
using namespace std;
int n,a[1000];
int main()
{
    cin >> n;
    a[1] = 1;
    for( int i = 2; i <= n; i++)
    {
        a[i] = a[i - 1] * 2 + 1;
    }
    return 0;
}
/**************************************************************
	Problem: 1223
	User: yangwanning
	Language: C++
	Result: Wrong Answer
****************************************************************/