#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;


ll f(ll n) {
    return (1 + n) * n / 2;
}
ll f2(ll n, ll a) {
    return f(n / a) * a;
}
int main()
{

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

    

    while (Q--) {
        
        string p;
        cin >> p;
        if (p[p.size() - 1] == '0')p[p.size() - 1] = '1';
        else p[p.size() - 1] = '0';
        cout << p;
    }

    return 0;
}