#include<string>
#include<iostream>
using namespace std;
int main() {
	string str;
	cin >> str;
	int len = str.length();
	if (str[0] == '-') {
		cout << "-";
		for (int i = len-1; i >0; i--) {
			if( (i == len - 1) && str[i] == '0')
				continue;
			cout << str[i];
		}
	}
	else{
		for (int i = len-1; i >=0; i--) {
			if ((i == len - 1) && str[i] == '0')
				continue;
			cout << str[i];
		}
	}
	if (str[0] == '0') {
		cout << "0" << endl;
	}
	return 0;
}