Question
A bipartite graph has nL nodes on the left (0..nL-1) and nR nodes on the right (0..nR-1). edges is a list of [u, v] meaning left node u connects to right node v. Return the size of a minimum vertex cover: the fewest nodes (from either side) such that every edge has at least one endpoint chosen. Constraints: 1 <= nL, nR <= 200; edges may be empty or contain duplicates.
min_vertex_cover_bipartite(nL: int, nR: int, edges: list[list[int]]) → int[3,3,[[0,0],[0,1],[1,1],[2,2]]]out3State 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.
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.