题解 | #游游的数字圈#

import java.util.Scanner;

// 注意类名必须为 Main, 不要有任何 package xxx 信息
public class Main {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        String s = in.next();
        int n = s.length();
        int count = 0;
        for (int i = 0; i < n; i++) {
            char c = s.charAt(i);
            if (c == '0' || c == '6' || c == '9') {
                count++;
            }
            else if (c == '8') {
                count += 2;
            }
        }
        System.out.println(count);
    }
}