#include<bits/stdc++.h>
using namespace std;
int main()
{

	int x,y;
	cin>>x;
	if(x>0)
	{
	while(x>0)
	{
		y=x%10;
		cout<<y;
		x/=10;
	}
	}
	**else if(x<0)
	{
		cout<<"-"; 
	while(-x<0)
	{
		y=-x%10;
		cout<<y;
		x/=10;
	}
	}**
    else
    cout<<'0';
	return 0;
}