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

typedef long long ll;
#define REP(i,n) for(int i=0,_n=(int)(n);i<_n;++i)
#define ALL(v) (v).begin(),(v).end()
template<class T1,class T2>ostream& operator<<(ostream& os,const pair<T1,T2>&a){return os<<"("<<a.first<<","<<a.second<< ")";}
template<class T>void pv(T a,T b){for(T i=a;i!=b;++i)cout<<(*i)<<" ";cout<<endl;}
template<class T>bool chmin(T&a,const T&b){return a>b?(a=b,1):0;}
template<class T>bool chmax(T&a,const T&b){return a<b?(a=b,1):0;}

ll a(ll n) {
  if (n <= 1) {
    return 0;
  } 
  if (n % 2 == 0) {
    return a(n/2) + n/2;
  } else {
    return 2 * a(n/2);
  }
  return 0;
}

int main2() {
  ll n; cin >> n;
  ll ans = a(n);
  cout << ans << endl;
  return 0;
}

int main() {
  for (;!cin.eof();cin>>ws) main2();
  return 0;
}