CodingMediumcod-g270

Subject Dp on intervalsLevel Mid–Senior~25 minCommon in Algorithms & data structures interviewsIndustries Software development

Question

Given a string s, return the minimum number of characters you must insert anywhere to turn s into a palindrome. 1 <= len(s) <= 500, s contains lowercase letters only.

Implement

min_palindrome_insertions(s: str) → int

Examples

in["zzazz"]out0

What a strong answer looks like

State your approach and its time/space complexity out loud before you optimize. Handle the edge cases (empty input, duplicates, overflow), and say why you chose this over the brute force. Green tests are the floor, not the grade.

Learn the concepts

Vibe coding: describe the solution in plain language (or narrate it) and the coach grades your approach. Generating runnable code from your description is coming next.

Run or narrate your approach, then ask the coach.