#include <iostream>
#include <iomanip>
#include <vector>
#include <algorithm>
#include <utility>
#include <string>
#include <queue>
#include <stack>
#include <unordered_set>
#include <unordered_map>

using namespace std;

typedef long long int ll;
typedef pair<int, int> Pii;

const ll mod = 998244353;

ll ipow(ll x, ll n) {
  ll ret = 1;
  while (n > 0) {
    if (n & 1) ret = ret * x;
    x = x * x;
    n >>= 1;
  }
  return ret;
}

int main() {
  cin.tie(0);
  ios::sync_with_stdio(false);

  ll n;
  cin >> n;

  ll ans = ipow(2, __builtin_popcountll(n)) - 2;

  cout << ans << endl;

  return 0;
}