#define _USE_MATH_DEFINES
#include  <cmath>
#include <cstdio>
#include <vector>
#include <iostream>
#include <algorithm>
#include <string>
#include<math.h>
#include<iomanip>
#include<stdio.h>
#include <stdlib.h>
#include<stdio.h>
#include <queue>
#include<map>
#include <sstream>
#include<set>
#include<stack>
#include<time.h>
#include <sys/types.h>
#include <tuple>
#include <numeric>


typedef long long int ll;
//#include<bits/stdc++.h>


using namespace std;



int main()
{

    int Q;
    Q = 1;
    //cin >> Q;

    while (Q--) {
        string p;
        cin >> p;
        if (p[0] != 'x')cout << p;
        else {
            ll a = pow(2, 32);
            string b = p.substr(1);
            ll d = 0;
            for (int i = 1; i < p.size(); i++)
            {
                d += p[i] - '0';
                if(i<p.size()-1)d *= 10;
            }
            
            cout << a - d;
        }
        

    }

    return 0;
}