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목록Binary Tree Level Order Traversal (1)
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LeetCode: 102. Binary Tree Level Order Traversal
BFS하면서 기록해준다. from collections import deque # Definition for a binary tree node. # class TreeNode: # def __init__(self, val=0, left=None, right=None): # self.val = val # self.left = left # self.right = right class Solution: def levelOrder(self, root: Optional[TreeNode]) -> List[List[int]]: if not root: return [] ret = [] q = deque() q.append((root, 0)) while q: cur_node, cur_level = q.popleft() ..
Computer Science/Coding Test
2021. 10. 20. 16:15