Code RoomCount articulation points
HardPrep Room Coding #1452

Count articulation points

CodingAlgorithms & data structuresSenior~35 min

Given an undirected simple graph on n nodes (0..n-1) as edges [u, v] (no self loops or parallel edges), return the number of articulation points (cut vertices): nodes whose removal (with their incident edges) increases the number of connected components. Constraints: 1 <= n <= 60.

Implement
count_articulation(n: int, edges: list[list[int]]) → int
Examples
in[5,[[0,1],[1,2],[2,0],[2,3],[3,4]]]out2
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.

0:00 of about 35 min
InputExpectedGot
[5,[[0,1],[1,2],[2,0],[2,3],[3,4]]]2not run yetsample