Given an array of N integers, find the contiguous subarray (which must contain at least one number) with the maximum sum and return its sum.
Here are some examples:
  1. max_subarray([1,2,3,-2,5]) should return 9 because the sum of the subarray [1,2,3,-2,5] is 9, and the sum of any other subarray is always less.
  2. max_subarray([-1,-2,-3,-4]) should return -1 because the maximum sum subarray is [-1].
  3. max_subarray([5,-1,6,-2,7]) should return 15 because the maximum sum subarray is [5, -1, 6, -2, 7].
  4. max_subarray([-2, 1, -3, 4, -1, 2, 1, -5, 4]) should return 6 because the maximum sum subarray is [4, -1, 2, 1].
  5. max_subarray([-2, -5, 6, -2, -3, 1, 5, -6]) should return 7 because the maximum sum subarray is [6, -2, -3, 1, 5].
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Last Solution submitted on Feb 24, 2026

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Pauli Huusari Armando Longobardi Alexander Ross Naz

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