13 lines
724 B
Plaintext
13 lines
724 B
Plaintext
Today’s exercise comes from Stack Overflow:
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Given an array A consisting of N integers, return the maximum sum of two numbers
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whose digits add up to an equal sum. If there are not two numbers whose digits
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have an equal sum, the function should return -1. For example, A = [51, 71, 17,
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42] would output 93 because there are two sets of numbers with the same
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digit-sum, (51, 42) with a digit-sum of 6 and (17, 71) with a digit-sum of 8,
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and the first pair has the maximum sum of two numbers of 93.
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Your task is to write a program to calculated the requested maximum sum. When
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you are finished, you are welcome to read or run a suggested solution, or to
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post your own solution or discuss the exercise in the comments below.
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