题解 | HJ56 #完全数计算#

import java.util.*;

// 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 scanner = new Scanner(System.in);
        int nextInt = scanner.nextInt();
        int i = nextInt;
        int flag = 1;
        ArrayList<Integer> list = new ArrayList<>();
        while (flag <= i) {
            if (IsCompleteNum(flag)) {
                list.add(flag);
            }
            flag++;
        }
        System.out.println(list.size());
    }
    public static boolean IsCompleteNum(int i) {
        int count = 0;
        int flag = 1;
        while (flag < i) {
            if (i % flag == 0) {
                count += flag;
            }
            flag++;
        }
        if (count == i) {
            return true;
        } else {
            return false;
        }
    }
}