{ "data": { "question": { "questionId": "2473", "questionFrontendId": "2342", "boundTopicId": null, "title": "Max Sum of a Pair With Equal Sum of Digits", "titleSlug": "max-sum-of-a-pair-with-equal-sum-of-digits", "content": "

You are given a 0-indexed array nums consisting of positive integers. You can choose two indices i and j, such that i != j, and the sum of digits of the number nums[i] is equal to that of nums[j].

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Return the maximum value of nums[i] + nums[j] that you can obtain over all possible indices i and j that satisfy the conditions.

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Example 1:

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\nInput: nums = [18,43,36,13,7]\nOutput: 54\nExplanation: The pairs (i, j) that satisfy the conditions are:\n- (0, 2), both numbers have a sum of digits equal to 9, and their sum is 18 + 36 = 54.\n- (1, 4), both numbers have a sum of digits equal to 7, and their sum is 43 + 7 = 50.\nSo the maximum sum that we can obtain is 54.\n
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Example 2:

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\nInput: nums = [10,12,19,14]\nOutput: -1\nExplanation: There are no two numbers that satisfy the conditions, so we return -1.\n
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Constraints:

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OpenJDK 17 . Java 8 features such as lambda expressions and stream API can be used.

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Most standard library headers are already included automatically for your convenience.

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Includes Pair class from https://docs.oracle.com/javase/8/javafx/api/javafx/util/Pair.html.

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