# https://leetcode.com/problems/finding-3-digit-even-numbers

from typing import List

class Solution:
    def findEvenNumbers(self, digits: List[int]) -> List[int]:
        counts = [0] * 10
        for digit in digits:
            counts[digit] += 1
        answer = []
        i = 0
        while i < 10:
            if i == 0 or counts[i] == 0:
                i += 1
                continue
            counts[i] -= 1
            j = 0
            while j < 10:
                if counts[j] == 0:
                    j += 1
                    continue
                counts[j] -= 1
                k = 0
                while k < 10:
                    if counts[k] == 0:
                        k += 1
                        continue
                    if k % 2 == 0:
                        answer.append(i * 100 + j * 10 + k)
                    k += 1
                counts[j] += 1
                j += 1
            counts[i] += 1
            i += 1
        return answer