题解 | #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 in = new Scanner(System.in);
        int number = in.nextInt();
        int result = 0;
        for (int i = 1; i <= number; i++) {
            ArrayList<Integer> arrays = new ArrayList<>();
            for (int j = 1; j < i; j++) {
                if (i % j == 0) {
                    arrays.add(j);
                }
            }
            int sum = 0;
            for (Integer num : arrays) {
                sum += num;
            }
            if (sum == i) {
                result++;
            }
        }
        System.out.println(result);
    }
}