#include <iostream>
#include <cassert>
#include <algorithm>

using namespace std;

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

  string s; cin >> s;
  if (s[0] == 'x') {
    reverse(s.begin(), s.end());
    s.pop_back();
    reverse(s.begin(), s.end());
    long long ss = stoll(s);
    cout << (1LL << 32) - ss << endl;
  } else {
    cout << s << endl;
  }
  return 0;
}