#include <stdio.h>
#include <bits/stdc++.h>
#include <atcoder/all>
using namespace atcoder;
using mint = modint998244353;
using namespace std;
#define rep(i,n) for (int i = 0; i < (n); ++i)
#define Inf32 1000000001
#define Inf64 1000000000000000001

int main(){
	
	long long n;
	cin>>n;
	long long ans = 1;
	rep(i,60){
		if((n>>i)&1)ans *= 2;
	}
	ans -= 2;
	cout<<ans<<endl;
    return 0;
}