#include <bits/stdc++.h>
using namespace std;
using ll = long long;

int main(){
	ll N;
	cin >> N;

	int p = __builtin_popcountll(N);
	if(p==1){
		cout << 0 << endl;
		return 0;
	}

	ll ans = 1;
	for(int d=0; d<60; d++){
		ll b = (N>>d)&1LL;
		if(b){
			ans *= 2;
		}
	}

	ans -= 2;

	cout << ans << endl;

	return 0;
}