#include<bits/stdc++.h>
using namespace std;
int ss(int n){
	int r;
	if(n==1)
		return 2;
	return ss(n-1)*2; 
}
int main(){
	int n; 
	cin>>n;
	cout<<ss(n);
return 0;}

/**************************************************************
	Problem: 1824
	User: fzy001
	Language: C++
	Result: Wrong Answer
****************************************************************/