취미가 좋다

https://leetcode.com/problems/lowest-common-ancestor-of-a-binary-tree/ Lowest Common Ancestor of a Binary Tree - LeetCode 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 Solution class Solution: def __init__(self): self.ans = None def lowestCommonAncestor(self, root, p, q) : ans = None def ..

https://leetcode.com/problems/kth-smallest-element-in-a-bst/ Kth Smallest Element in a BST - LeetCode 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 Solution class Solution: def kthSmallest(self, root, k): def rank(node, ans): if node.left and rank(node.left, ans): return True ans.append(n..

https://leetcode.com/problems/invert-binary-tree/ Invert Binary Tree - LeetCode 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 Solution from collections import deque class Solution: def invertTree(self, root: Optional[TreeNode]) -> Optional[TreeNode]: if not root: return root d = deque() d..

https://leetcode.com/problems/course-schedule-ii/ Course Schedule II - LeetCode 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 Solution class Solution: def __init__(self): self.ans = [] self.graph = defaultdict(set) self.visit = None def findOrder(self, numCourses: int, prerequisites: List..

https://leetcode.com/problems/course-schedule/ Course Schedule - LeetCode 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 Solution from queue import Queue class Solution: def canFinish(self, numCourses: int, prerequisites: List[List[int]]) -> bool: q = Queue() a2b = {} # a : 조건이 필요한 수업 b2a ..

https://leetcode.com/problems/number-of-islands/ Number of Islands - LeetCode 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 Solution class Solution: def __init__(self): self.m = 0 self.n = 0 self.grid = [] self.visit = [] def numIslands(self, grid): self.m = len(grid) self.n = len(grid[0]..