Leetcode Problem 2547. Minimum Cost to Split an Array

2547. Minimum Cost to Split an Array

Leetcode Solutions

Dynamic Programming with Precomputed Trimmed Subarray Lengths

  1. Initialize a 2D array trimmed to store the trimmed length for all subarrays starting from index i to j.
  2. Populate the trimmed array by iterating over all possible subarrays and counting the frequency of each element. If an element's frequency becomes 2, increase the trimmed length by 2; if it's more than 2, increase by 1.
  3. Initialize a 1D array dp to store the minimum cost to split the array starting from index i.
  4. For each index i from 0 to n-1, calculate the minimum cost by trying all possible next split positions j and using the precomputed trimmed lengths.
  5. The minimum cost for splitting at index i is the minimum of dp[j] + k + trimmed[i][j-1] for all j from i+1 to n.
  6. Return dp[0] as the minimum cost to split the entire array.
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Dynamic Programming with Optimized Space

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