#include<bits/stdc++.h>
//#include"atcoder/all"
#pragma GCC target("avx2")
#pragma GCC optimize("O3")
#pragma GCC optimize("unroll-loops")
#define all(a) (a).begin(),(a).end()
using namespace std;
//using namespace atcoder;
typedef long long ll;
int main(){
  ll N;cin >> N;
  ll K = N*2;
  ll ans = N;
  while(N){
    N >>= 1;
    ans += N;
  }
  cout << K-ans << "\n";
}