#define _CRT_SECURE_NO_WARNINGS // #pragma warning(disable:4996)
#include <iostream>
#include <algorithm>
#include <queue>
#include <map>
#include <string>
#include <set>
#include <cmath>
#include <functional>
using namespace std; 

#define rep(i,a,b) for(int i=(a);i<(b);i++)
#define pb push_back
#define mp(a,b) make_pair(a,b)
#define all(a) a.begin(),a.end()
#define pii pair<int, int>
#define ll long long
#define INF 1<<30

ll N;
ll a, b;

int main(void)
{
	scanf("%lld", &N);
	//printf("%lld\n",N);
	
	a = N*2;
	while(N) {
		b += N;
		N /= 2;
	}
	printf("%lld\n",a-b);


	return 0;
}