//P1307
#include <iostream>
using namespace std;

long long number_reverse(long long n){
	long long ans=0,t;
	while(n%10==0){
		n /= 10;
	}
	while(t){
		t = n % 10;
		n /= 10;
		ans += t;
		ans *= 10;
	}
	ans /= 100;
	return ans;
}

int main(){
	int n;
	cin >> n;
	cout << number_reverse(n);
	return 0;
}