#include <bits/stdc++.h>
using namespace std;
#define ULL unsigned long long
int main()
{
	ULL N;
	cin >> N;

	ULL def = N, sp = N * 2;
	while( N != 0 )
	{
		N /= 2;
		def += N;
	}
	cout << max( def, sp ) - min( def, sp ) << endl;
	return 0;
}