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蓝桥杯备赛学习笔记：高频考点与真题预测（C++/Java/python版）-CSDN博客

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By TreeNode left, Better Rose
| CSDN
2025蓝桥杯备赛学习笔记 ——高频考点与真题预测 通过对第13-15届蓝桥杯真题的分析，可以发现题目主要围绕基础算法、数据结构、数学问题、字符串处理、编程语言基础展开，且近年逐渐增加动态规划、图论、贪心算法等较难题目。 1. 基础算法（必考） 排序与查找 快速排序、归并排序（手写实现） 二分查找（变种题，如旋转数组查找） 搜索算法 DFS（回溯、排列组合） BFS（最短路径、层序遍历） 贪心算法 区间调度、背包问题（部分背包） 动态规划（重点） 背包问题（01背包、完全背包） 最长公共子序列（LCS） 股票买卖问题（变种DP） 2. 数据结构（必考） 线性表 数组（前缀和、差分数组） 链表（反转、快慢指针） 树与二叉树 二叉搜索树（BST）的插入、删除 平衡二叉树（AVL、红黑树概念） 图论 最短路径（Dijkstra、Floyd） 最小生成树（Prim、Kruskal） 栈与队列 单调栈（接雨水、柱状图最大矩形） 队列（BFS、滑动窗口） 3.
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Leetcode 2385. Amount of Time for Binary Tree to Be Infected

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By TreeNode left
| DEV Community
You are given the root of a binary tree with unique values, and an integer start. At minute 0, an infection starts from the node with value start. Each minute, a node becomes infected if: The node is currently uninfected. The node is adjacent to an infected node. Return the number of minutes needed for the entire tree to be infected.
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Valid Binary Search Tree

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By Prashant Mishra, TreeNode left
| DEV Community
Problem TC: O(n), SC: O(n) /** * Definition for a binary tree node.
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