#include <bits/stdc++.h>

using namespace std;

int main() {
    string s;
    cin >> s;
    if (s[0] == 'x') {
        long long ans = (1LL << 32) - stoi(s.substr(1, s.size() - 1));
        cout << ans << endl;
    } else {
        int ans = stoi(s);
        cout << ans << endl;
    }
}