#include <iostream>
#include <sstream>
#include <fstream>
#include <string>
#include <vector>
#include <deque>
#include <queue>
#include <stack>
#include <set>
#include <map>
#include <algorithm>
#include <functional>
#include <utility>
#include <bitset>
#include <cmath>
#include <cstdlib>
#include <ctime>
#include <cstdio>

using namespace std;
using ll = long long;

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