针对这类问题,线段树就派上了用场。 线段树(segment tree)在数据结构上属于一棵完全二叉树,通过利用“二分”的优势高效地解决数组中的区间问题(包括区间求和、最值等),同时也允许灵活地更改数组。以区间求和为例,对于给定的一个整数数组nums,求[start,end]区间上的和,可以分别求左区间、右区间的和,再相加。即 ...
链接:https://leetcode-cn.com/problems/binary-tree-inorder-traversal python # 0094.二叉树中序遍历 # 递归 & 迭代 class Solution: def inOrderRecur(self,head: TreeNode) -> int: """ 递归遍历,LNR, 左根右 :param head: :return: """ def traversal(head): # 递归终止条件 ifhead== None: ...
Search in a Binary Search Tree二叉搜索树中的搜索【Python】 LeetCode 0700. Search in a Binary Search Tree二叉搜索树中的搜索【Easy】【Python】【二叉树】 Problem LeetCode Given the root node of a binary search tree (BST) and a value. You need to find the node in the BST that the .....
1#Definition for a binary tree node2#class TreeNode:3#def __init__(self, x):4#self.val = x5#self.left = None6#self.right = None7#8#Definition for singly-linked list.9#class ListNode:10#def __init__(self, x):11#self.val = x12#self.next = None1314classSolution:15#@param he...