#include <iostream>
#include <vector>
#include <cmath>
#include <map>
#include <set>
#include <iomanip>
#include <queue>
#include <algorithm>
#include <numeric>
#include <deque>
#include <complex>
#include <cassert>

using namespace std;
using ll = long long;

int main(){

    ll N;
    string S;
    cin >> S;
    if (S[0] != 'x') cout << S << endl;
    else{
        N = stoll(S.substr(1));
        cout << (1LL<<32)-N << endl;
    }

    return 0;
}