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1. 문제 링크 https://leetcode.com/problems/binary-tree-level-order-traversal/ - LeetCode Can you solve this real interview question? - Level up your coding skills and quickly land a job. This is the best place to expand your knowledge and get prepared for your next interview. leetcode.com 2. 문제 설명 이진 트리의 각 레벨마다 노드 값을 모두 담은 리스트를 반환하는 것 예시) 아래 트리가 주어지면 [[3],[9,20],[15,7]]를 반환 3 / \ 9 20 / \ 15 7 3. 처음..

1. 문제 링크 https://leetcode.com/problems/implement-queue-using-stacks/ Implement Queue using Stacks - LeetCode Can you solve this real interview question? Implement Queue using Stacks - Implement a first in first out (FIFO) queue using only two stacks. The implemented queue should support all the functions of a normal queue (push, peek, pop, and empty). Implement t leetcode.com 2. 문제 설명 큐(Queue)는 ..

1. 문제 링크 https://leetcode.com/problems/implement-stack-using-queues/ LeetCode - The World's Leading Online Programming Learning Platform Level up your coding skills and quickly land a job. This is the best place to expand your knowledge and get prepared for your next interview. leetcode.com 2. 문제 설명 queue를 활용하여 stack을 구현하라. 여기서 stack은 last-in-first-out (LIFO)를 의미 일반적인 stack은 push, top, pop, empt..