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

#include <atcoder/all>
using namespace atcoder;

using ll = long long;

int main() {
  ll N;
  cin >> N;
  ll ans = 1;
  for(int i = 0; i < (int)__builtin_popcountll(N); i++) ans *= 2;
  cout << ans - 2 << endl;
}