Stack from queues
Implement a LIFO stack using only standard FIFO queue operations (enqueue at back, dequeue from front, peek front, size). Replay operations ["push", x], ["pop"], ["top"], ["empty"] and return the list of results from pop/top/empty (empty returns 1 for true, 0 for false; pop and top return the value). Make push do the rotation work so pop and top are O(1). Assume pop/top are not called on an empty stack.
Implement
stack_via_queue(ops: list[list]) → list[int]Examples
in
[[["push",1],["push",2],["top"],["pop"],["empty"]]]out[2,2,0]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 20 min
solution.py
InputExpectedGot
[[["push",1],["push",2],["top"],["pop"],["empty"]]][2,2,0]not run yetsample