HTMLify

class Solution:
    def digit_sum(self, num) -> int:
        s = 0
        for d in str(num):
            s += int(d)
        return s

    def maximumSum(self, nums) -> int:
        h = -1
        nums = sorted(nums, reverse=True)
        for i in range(len(nums)):
            for j in range(i+1, len(nums)):
                i_n = nums[i]
                j_n = nums[j]
                if i_n + j_n < h:
                    break
                i_s = self.digit_sum(nums[i])
                j_s = self.digit_sum(nums[j])
                if i_s != j_s:
                    continue
                s = i_n + j_n
                if s > h:
                    h = s
        return h