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: Accepted)

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

public class Main {
    public static void main(String[] args) throws IOException {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        String line = "";

        while ((line = br.readLine()) != null && !line.isEmpty()) {
            char[] str = line.toCharArray();
            char c;
            int u;
            for (int i = 0; i < str.length / 2; i++) {
                c = str[i];
                u = str.length - 1 - i;
                str[i] = str[u];
                str[u] = c;
            }
            System.out.println(str);
        }
    }
}