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

#define PI 4*atan(1)
#define INF 1e8

typedef long long ll;
typedef unsigned long long ull;


int dx[4] = {1,0,-1,0};
int dy[4] = {0,1,0,-1};

int main(){
  ull N;
  cin >> N;
  ull ans = 0;
  ull n = N * 2;
  while(1){
    ans += N;
    N /= 2;
    if(N == 0)break;
  }
  cout << n - ans << endl;
}