#include <bits/stdc++.h>

using namespace std;

int main() {
    string num;
    cin >> num;
    if (num[0] == '-') cout << '-', num = num.substr(1);
    reverse(num.begin(), num.end());
    while (num.size() > 1 && num[0] == '0') num = num.substr(1);
    cout << num << endl;

    return 0;
}