#include <bits/stdc++.h>
using namespace std;
typedef long long ll;

int main(){
    ll n;
    cin >> n;
    ll res2 = 0;
    ll k = n;
    for(int i=0;;i++){
        res2 += n;
        n /= 2;
        if(n == 0) break;
    }
    //res2を求める
    ll res1 = 2*k;
    cout << res1 - res2 << endl;
    return 0;
}