#include <stdio.h>

/* ideja:

obrni(14365) = 5*10000 + obrni(1436)
	     = 50000 + 6341
	     = 56341

problem: kako dobiti 10000? moze pomocna funkcija ovde
*/

unsigned magnituda(unsigned n){
	unsigned m=1;
	n=n/10;
	while(n!=0){
		n/=10;
		m*=10;
	}
	return m;
}

unsigned obrni(unsigned n){
	unsigned res;
	if(n==0)
		return 0;
	res =  n%10*magnituda(n) + obrni(n/10);
	return res;
}

int main(){
	unsigned n;
	scanf("%u", &n);
	printf("%u\n", obrni(n));
	return 0;
}