#include<iostream>
#include<string>
#include<algorithm>
using namespace std;
string s;
int main()
{
    cin >> s;

    bool a = false;

    if(s[0] == '-') s.erase(0, 1), a = true;

    reverse(s.begin(), s.end());

    while(s[0] == '0')
    {
        s.erase(0, 1);
    }
    if(a) cout << "-";
    cout << s;

    return 0;
}