Given an integer array, repeatedly remove contiguous subarrays that are palindromes and return the minimum number of moves to delete the whole array. This is an interval DP problem: compute minimal removals for each subarray with transitions for splitting and for merging when endpoints can be removed together (matching values).
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Time‑complexity justification Test cases discussed- "abba", "acbba", "abc", empty string, single character, "abca", "deeee", "racecarx" etc. Extension to k removals- Added recursion/helper tracking remaining removals; worst‑case O(2^k · n). Extension to replacements– Same two‑pointer scan, decrement k on mismatch; O(n) time, O(1) space.
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