#include <bits/stdc++.h>
using namespace std;
char a[100];
int main(){
	cin >> a;
	int l = strlen(a);
	if(a[0] == '-')
		cout << "-";
	for(int i = l - 1;i >= 0;i--){
		if(a[i] != '0' && a[i] != '-')
			cout << a[i];
	}
	return 0;
}