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Leetcode Problem 1911. Maximum Alternating Subsequence Sum

1911. Maximum Alternating Subsequence Sum

Leetcode Solutions

Dynamic Programming Approach

  1. Initialize two variables, even and odd, to represent the maximum alternating sum ending with a positive sign and a negative sign, respectively.
  2. Iterate through the array nums.
  3. For each element a in nums, update even to be the maximum of even and odd + a.
  4. Update odd to be even - a.
  5. After the iteration, even will hold the maximum alternating sum of any subsequence.
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Recursion with Memoization Approach

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