题解 | #数组分组#

import java.util.*;
public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        while (sc.hasNextInt()) {
            ArrayList<Integer> list = new ArrayList<>();
            int n = sc.nextInt();
            int val = 0;
            int sum = 0;
            for (int i = 0; i < n; i++) {
                int k = sc.nextInt();
                sum = sum + k;
                if (k % 5 == 0) {
                    val = val + k;
                } else if (k % 3 != 0) {
                    list.add(k);
                }
            }
            if (sum % 2 != 0) {
                System.out.println(false);
            } else {
                int num = sum / 2 - val;
                System.out.println(function(list, num));
            }
        }
    }

    public static boolean function(List<Integer> list, int n) {
        if (n == 0) {
            return true;
        }
        if (list.size() == 0) {
            return false;
        }
        for (int i = 0; i < list.size(); i++) {
            if (list.get(i) == n) {
                return true;
            }
        }
        for (int i = 0; i < list.size(); i++) {
            int k = list.get(i);
            List<Integer> tempList = new ArrayList<>(list);
            tempList.remove((Integer)k);
            if (function(tempList, n - k)) {
                return true;
            }
        }
        return false;
    }
}