额...

#include<iostream>
#include<cstdio>
#include<bits/stdc++.h>
using namespace std;
string s;
int i;
int main(){
	cin>>s;
	int len=s.length();
	if(s[0]=='-'){
		cout<<"-";
		if(s[len-1]=='0'){
			for(i=s.length()-2;i>=1;i--){
				cout<<s[i];
			}
		}else{
			for(i=s.length()-1;i>=1;i--){
				cout<<s[i];
			}
		}
	}else{
		for(i=s.length()-1;i>=0;i--){
				cout<<s[i];
		}
	}
	return 0;
}