#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;
}

#include<bits/stdc++.h>
using namespace std;
int main()
{
	int N, b, sum, n;
	cin >> N;
	n = N;
	if (n < 0)
		n = -n;
	if (n % 10 == 0)
		n /= 10;
	sum = 0;
	while (n >= 1)
	{
		b = n % 10;
		sum = sum * 10 + b;
		n /= 10;
	}
	if (N < 0)
	{
		sum = -sum;
	}
	cout << sum;
	return 0;
}