#include <bits/stdc++.h>
#ifdef LOCAL
#include "./debug.cpp"
#else
#define debug(...)
#define print_line
#endif
using namespace std;
using ll = long long;

int main() {
    string S;
    cin >> S;
    if (S[0] == 'x') {
        S = string(S.begin() + 1, S.end());
        int T = stoi(S);
        cout << (1ll << 32) - T << endl;
    } else {
        cout << S << endl;
    }
}