Problem:
Reverse Sequence

Write a program which reverses a given string str.

Input

str (the size of str ≤ 20) is given in a line.

Output

Print the reversed str in a line.

Sample Input

w32nimda

Output for the Sample Input

admin23w

Solution in JAVA (judge verdict: Wrong Answer)

import java.io.IOException;
import java.io.InputStreamReader;

public class Main {
	public static void main(String[] args) throws IOException {
		InputStreamReader is = new InputStreamReader(System.in);
		char[] buf = new char[20];
		while (is.read(buf) != -1) {
		}
		for (int i = buf.length - 1; i >= 0; i--) {
			if (buf[i] != '\0')
				System.out.print(buf[i]);
		}
	}
}