#ifndef SHO_LOCAL
#include <bits/stdc++.h>
#define debug(...) ;
#else
#include "debug.h"
#endif
#define all(x) (x).begin(), (x).end()
#define lb(x, a) lower_bound(all(x), (a)) - (x).begin()
typedef long long ll;
using namespace std;

const ll N = 1LL << 32;
int main() {
  iostream::sync_with_stdio(0), cin.tie(0);
  string s;
  cin >> s;
  if (s[0] == 'x') {
    ll x = 0;
    int n = (int)s.size();
    for (int i = 1; i < n; i++) {
      x *= 10;
      x += s[i] - '0';
    }
    cout << N - x << '\n';

  } else {
    cout << s << '\n';
  }

  return 0;
}