CodingHardcod-g139

Subject SubsetsLevel Senior–Staff~28 minCommon in Distributed systems · Algorithms & data structures interviewsIndustries Software development

Question

Given matchstick lengths, determine whether you can use every matchstick exactly once to form the four equal-length sides of a square (you may not break a matchstick). 1 <= len(matchsticks) <= 12, lengths are positive. Return a boolean.

Implement

makesquare(matchsticks: list[int]) → bool

Examples

in[[1,1,2,2,2]]outtrue

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.