Question
Implement a fixed-size circular (ring) buffer of capacity `capacity`. Process operations: ["push", x] appends x; if the buffer is full, the oldest element is overwritten (dropped) to make room. ["pop"] removes and conceptually returns the oldest element (a no-op if empty). ["snapshot"] yields the current buffer contents from oldest to newest. Return a list containing one entry per snapshot operation, each being the list of current contents oldest-to-newest. capacity is a positive integer.
ring_buffer(capacity: int, ops: list[list]) → list[list][3,[["push",1],["push",2],["push",3],["push",4],["snapshot"]]]out[[2,3,4]]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.
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.