#include<bits/stdc++.h>
using namespace std;
int main(){
	int n,s=0,nn;
	cin>>n;
	if(n<0)
	{
	 cout<<"-";
	 n=-n;
	}
	while(n){
		nn=n%10;
		s=s*10+nn;
		n=n/10;
	}cout<<s;
	return 0;
}