Problem:
Score : 100 points

Problem Statement

You are given a string S of length 2 or 3 consisting of lowercase English letters. If the length of the string is 2, print it as is; if the length is 3, print the string after reversing it.

Constraints

The length of S is 2 or 3.

S consists of lowercase English letters.

Input

Input is given from Standard Input in the following format:

S

Output

If the length of S is 2, print S as is; if the length is 3, print S after reversing it.

Sample Input 1

abc

Sample Output 1

cba

As the length of S is 3, we print it after reversing it.

Sample Input 2

ac

Sample Output 2

ac

As the length of S is 2, we print it as is.

Solution in C (GCC 5.4.1) (judge verdict: Accepted)

#include <stdio.h>
#include <string.h>

void reverse(char *S) {
	char tmp;
	int i;
	int length = strlen(S);
	for (i = 1; i <= length / 2; i++) {
		tmp = S[i - 1];
		S[i - 1] = S[length - i];
		S[length - i] = tmp;
	}
}

int main() {
	char S[3], ans[3];
	int i;
	scanf("%s", S);
	if (strlen(S) > 2)
		reverse(S);
	printf("%s", S);
	return 0;
}