#include<bits/stdc++.h>
using namespace std;
string s1,s2;
int a[105]={1};
int b[1000];

int main()
{
    int n ,len;
    cin >> n;
    int k = 1; 
    int k2 = 0;
    int t  = 1;
    for(int i = 0;i < n;i++)
    {
        
        for (int j =0;j<k;j++)
        {
            a[j] = a[j] * 2;
        }
        
        //进位
        for( int j = 0 ;j < k; j++)
        {
            if ( a[j]  >= 10)
            {
                a[j + 1] = a[j+1] + a[j] /10;
                a[j] = a[j] % 10; 
            }
        }
        if (a[k]!=0) k++;
        len =max(k,k2);
        for(int j = 0;j<len;j++)
        {
            b[j] += a[j];
            if ( b[j]  >= 10)
            {
                b[j + 1] = b[j+1] + b[j] /10;
                b[j] = b[j] % 10; 
            }
        }  
        if (b[k2] !=0 ) k2++; 
    }


    
    for(int i = len-1;i>=0;i--) cout << b[i];

    return 0;
}
/**************************************************************
	Problem: 1281
	User: mariooo
	Language: C++
	Result: Wrong Answer
****************************************************************/