#include <cstdio>
#include <cstring>
#include <iostream>
#include <string>
#include <cmath>
#include <bitset>
#include <vector>
#include <map>
#include <set>
#include <queue>
#include <deque>
#include <algorithm>
using namespace std;
typedef long long int ll;
typedef pair<int, int> P;

int main()
{
	ll n;
	cin>>n;
	int c=0;
	ll n1=n;
	while(n1>0){
		c+=(n1%2);
		n1/=2;
	}
	cout<<n+1-(1ll<<c)<<endl;
	return 0;
}