#include <iostream>
#include <string>
#include <cassert>
using namespace std;
typedef long long ll;

int main(){
    string S;
    cin >> S;
    ll ans;
    if (S[0] == 'x'){
        int len = S.size();
        string T = S.substr(1, len - 1);
        ans = (1LL << 32) - stoll(T);
    }
    else{
        ans = stoll(S);
    }
    assert(ans >= 0 && ans <= 3616918520);
    assert(ans % 10 == 0);
    cout << ans << endl;
}