Leetcode Problem 1420. Build Array Where You Can Find The Maximum Exactly K Comparisons

1420. Build Array Where You Can Find The Maximum Exactly K Comparisons

Leetcode Solutions

Approach: Top-Down Dynamic Programming

  1. Define a memoized function dp(i, maxSoFar, remain).
  2. If i == n, return 1 if remain == 0, and 0 otherwise.
  3. If remain < 0, return 0.
  4. Initialize ans as maxSoFar * dp(i + 1, maxSoFar, remain).
  5. Iterate num in the range [maxSoFar + 1, m]:
    • Add dp(i + 1, num, remain - 1) to ans.
  6. Return ans.
  7. Return dp(0, 0, k) as the answer to the original problem.
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Approach: Bottom-Up Dynamic Programming

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