#include <bits/stdc++.h>
#define PI 3.14159265359
#define NIL -1
using namespace std;
const int64_t MOD = 1e9 + 7;

int main() {
	int64_t N;
	cin >> N;

	int64_t sum = N;
	while (N) {
		N /= 2;
		sum += N;
	}

	cout << 2 * N - sum << endl;
}