#include <bits/stdc++.h>
#define FOR(i,a,b) for(int i = (a); i < (b); ++i)
#define REP(i,n) FOR(i,0,n)
#define SZ(n) (int)(n).size()
#define ALL(n) (n).begin(), (n).end()
#define MOD % 1000000007
using namespace std;
typedef long long LL;
typedef vector<int> VI;

int main() {
	LL n;
	cin >> n;
	LL ans = n + 2 * n / 2;
	while (n) {
		ans -= n;
		n /= 2;
	}
	cout << ans << endl;
	return 0;
}