C :

#include<stdio.h>
#include<math.h>
main()
{
	int n;
	int a,b,c;
	scanf("%d",&n);
	n = fabs(n);
	a = n/100;
	b = n/10-a*10;
	c = n%10;
	printf("%d%d%d",c,b,a);
	return 0;
}