Question
You operate a content-distribution network modeled as a directed acyclic graph of n servers (0..n-1); edge [a, b] means server a can push content to server b. You want to seed content into the fewest servers so that every server eventually receives it (directly or transitively). Return the minimum number of seed servers required. The graph is guaranteed acyclic; self-loops, if present, should be ignored.
min_seed_nodes(n: int, edges: list[list[int]]) → int[4,[[0,1],[0,2],[2,3]]]out1State 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.