题解 | #字符串反转#

平平无奇

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        while (sc.hasNext()) {
            String input = sc.next();
            StringBuilder builder = new StringBuilder();
            for (int i = input.length() -1; i >= 0; i--) {
                builder.append(input.charAt(i));
            }
            System.out.println(builder);
        }
    }
}