#include <bits/stdc++.h>
using namespace std;
int main(){
    int a[100][100]={0};
    int r[100]={0};
    int i,j,n;
    cin>>n;
    a[0][0]=1;
    int k=1;
    for(i=1;i<=n;i++){
        for(j=0;j<k;j++){
            a[i][j]=a[i-1][j]*2;
        }
        for(j=0;j<k;j++){
            if(a[i][j]>=10){
                a[i][j+1]=a[i][j+1]+a[i][j]/10;
                a[i][j]=a[i][j]%10; 
            }
        }
            
        if(a[i][k]>0){
            k++;
        }
    }
    for(i=1;i<=n;i++){
        for(j=0;j<k;j++){
            r[j]=r[j]+a[i][j];
            if(r[j]>=10){
                r[j+1]+=r[j]/10;
                r[j]=r[j]%10;
            }
        }
        if(r[k]>0){
            k++;
        }
    }
    int p=0;
    for(i=k-1;i>=0;i--){
        if(r[i]!=0){
            p=i;
            break;
        }
    } 
    
    for(i=p;i>=0;i--){
        cout<<r[i];
    } 
}
/**************************************************************
	Problem: 1281
	User: fuyijun
	Language: C++
	Result: Accepted
	Time:14 ms
	Memory:2072 kb
****************************************************************/