#include <iostream>
#include <vector>
#include <iomanip>
#include <algorithm>
#include <map>
#include <cmath>
#include <bitset>
#include <string>
#include <queue>
#include <stack>
#include <set>
#include <tuple>
#include <atcoder/all>
#include <sstream> 
#include <regex>
#include <fstream> // ifstream ifs("workspacetop.txt");
using namespace atcoder;
using mint = modint998244353;
//using mint = modint1000000007;
using namespace std;
using ll = long long;
static const double pi = 3.141592653589793;
const int INF = (1<<29);
const ll mod = 998244353;

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