/**/
#include <cstdio>
#include <cstring>
#include <cmath>
#include <cctype>
#include <iostream>
#include <algorithm>
#include <map>
#include <set>
#include <vector>
#include <string>
#include <stack>
#include <queue>

typedef long long LL;
using namespace std;

double f[65];

double pow(int x, int num){
	double ans = 1;
	for (int i = 1; i <= num; i++){
		ans *= x;
	}
	return ans;
}

void init(){
	f[1] = 1;
	f[2] = 3;
	for (int i = 3; i <= 64; i++){
		double minn = 0x3f3f3f3f;
		for (int j = 1; j < i; j++){
			minn = min(minn, 2 * f[j] + pow(2, i - j) - 1);
		}
		f[i] = minn;
	}
}

int main()
{
	//freopen("in.txt", "r", stdin);
	//freopen("out.txt", "w", stdout);

	int n;
	init();
	while(scanf("%d", &n) == 1){
		printf("%d\n", (int)f[n]);
	}

	return 0;
}
/**/