#include <iostream>
#include <string>

using namespace std;

int main() {
    string s;
    cin >> s;

    if (s[0] == 'x') {
        unsigned int t = 0;
        for (int i = 1; i < s.size(); i++) {
            t = t * 10 + (s[i] - '0');
        }
        cout << (1ULL << 32) - t << endl;
    } else {
        cout << s << endl;
    }

    return 0;
}