Tech for good

# 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 = rightclass Solution: def leafSimilar(self, root1: Optional[TreeNode], root2: Optional[TreeNode]) -> bool: # 주어진 트리의 리프 노드(leaf node) 값을 순서대로 가져오는 함수 def get_leaf_sequence(root: Optional[TreeNode]) -> ..

# 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 = rightclass Solution: def sumOfLeftLeaves(self, root: Optional[TreeNode]) -> int: if not root: return 0 total = 0 # 왼쪽 자식이 리프 노드라면 값 추가 if root.left and not root.left.l..