#include <stdio.h>
#include <algorithm>
#include <vector>
#include <deque>
#include <string>
#include <iostream>
using namespace std;
using ll = long long;

void solve();
int main() {
	solve();
#ifdef DBG
	while (true);
#endif
}


//378
void solve() {
	ll n, total, best;
	scanf("%lld", &n);
	best = 2 * n;
	for (total = 0; n != 0; n /= 2)
		total += n;
	printf("%lld\n", best - total);
}