题解 | #计算某字符出现次数#

/**
 * 数字颠倒
 */
public class Main {

    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        int item = scan.nextInt();
        StringBuilder sb = new StringBuilder();

        do {
            int i = item % 10;
            sb.append(i);
            item = item/10;
        } while (item!=0);

        System.out.println(sb.toString());

    }

}