#include <cstdio>

int main(){
	int n,t;
	scanf("%d",&n);
	
	t=0;
	while (n!=0){
		t=t*10+n%10;
		n=n/10;
	}
	
	printf("%d\n",t);
	
	int pause;
	scanf("%d",&pause);
	return 0;   
}