题解 | #取近似值#

import java.util.Scanner;

public class Main{

public static void main(String[] args) {
    Scanner scanner = new Scanner(System.in);

    String str = scanner.nextLine();

// String reverseStr = "";

// for (int i = str.length() - 1; i >= 0; i--) {
// reverseStr = reverseStr + str.charAt(i);
// }

    StringBuilder sb = new StringBuilder(str);

    System.out.println(sb.reverse());
}

}