#include <stdio.h>

int reverse(int n)
{
	int digit = 0, i;
	bool sign;
	
	if (n < 0)
	{
		sign = false;
		n *= -1;
	}
	else
		sign = true;
	while (n > 0)
	{
		i = n % 10;
		digit = digit * 10 + i;
		n /= 10;
	}
	
	if (sign)
		return digit;
	else
		return digit*-1;
}

int main(void)
{
	int n;
	scanf("%d", &n);
	int res = reverse(n);
	printf("%d\n", res);

	return 0;
}