Question
Design a stack that, in addition to push and pop, can report the current minimum AND current maximum in O(1) time. Simulate it: given a list of operations where each op is ['push', x], ['pop'], ['min'], or ['max'], return the list of results produced by the 'min' and 'max' queries in order. 'pop' on the described sequence is always valid. Values fit in 32-bit signed integers.
min_max_stack(ops: list[list]) → list[int][[["push",5],["push",2],["min"],["max"],["push",8],["max"],["pop"],["max"]]]out[2,5,8,5]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.