#include <bits/stdc++.h>
#define REP(i, a, n) for(ll i = ((ll) a); i < ((ll) n); i++)
using namespace std;
typedef long long ll;

int main(void) {
  ll N;
  cin >> N;

  ll cnt = 0;
  REP(i, 0, 63) if(N & (1LL << i)) cnt++;

  ll p = 1;
  REP(i, 0, cnt) p *= 2;
  cout << N + 1 - p << endl;
}