收录 LeetCode 精选 100 道高频算法题，按知识点分类整理，附每题链接与难度标注。
<div class="lc-stat-num" style="color:#4a6cf7">100</div>
<div class="lc-stat-label">总题数</div><div class="lc-stat-num" style="color:#00b8a3">17</div>
<div class="lc-stat-label">简单</div><div class="lc-stat-num" style="color:#ffb800">72</div>
<div class="lc-stat-label">中等</div><div class="lc-stat-num" style="color:#ff375f">11</div>
<div class="lc-stat-label">困难</div>
🔑 哈希
Hash Table
<span class="badge badge-total">3 题</span>
<span class="badge badge-easy">简单 ×1</span>
<span class="badge badge-medium">中等 ×2</span>
👆 双指针
Two Pointers
<span class="badge badge-total">4 题</span>
<span class="badge badge-easy">简单 ×1</span>
<span class="badge badge-medium">中等 ×2</span>
<span class="badge badge-hard">困难 ×1</span>
🪟 滑动窗口
Sliding Window
<span class="badge badge-total">2 题</span>
<span class="badge badge-medium">中等 ×2</span>
🔍 子串
Substring
<span class="badge badge-total">3 题</span>
<span class="badge badge-medium">中等 ×1</span>
<span class="badge badge-hard">困难 ×2</span>
📊 普通数组
Array
<span class="badge badge-total">5 题</span>
<span class="badge badge-medium">中等 ×4</span>
<span class="badge badge-hard">困难 ×1</span>
🗂️ 矩阵
Matrix
<span class="badge badge-total">4 题</span>
<span class="badge badge-medium">中等 ×4</span>
🔗 链表
Linked List
<span class="badge badge-total">14 题</span>
<span class="badge badge-easy">简单 ×5</span>
<span class="badge badge-medium">中等 ×7</span>
<span class="badge badge-hard">困难 ×2</span>
🌲 二叉树
Binary Tree
<span class="badge badge-total">15 题</span>
<span class="badge badge-easy">简单 ×6</span>
<span class="badge badge-medium">中等 ×8</span>
<span class="badge badge-hard">困难 ×1</span>
🕸️ 图论
Graph
<span class="badge badge-total">4 题</span>
<span class="badge badge-medium">中等 ×4</span>
↩︎️ 回溯
Backtracking
<span class="badge badge-total">8 题</span>
<span class="badge badge-medium">中等 ×7</span>
<span class="badge badge-hard">困难 ×1</span>
🎯 二分查找
Binary Search
<span class="badge badge-total">6 题</span>
<span class="badge badge-easy">简单 ×1</span>
<span class="badge badge-medium">中等 ×4</span>
<span class="badge badge-hard">困难 ×1</span>
📚 栈
Stack
<span class="badge badge-total">5 题</span>
<span class="badge badge-easy">简单 ×1</span>
<span class="badge badge-medium">中等 ×3</span>
<span class="badge badge-hard">困难 ×1</span>
⛰️ 堆
Heap / Priority Queue
<span class="badge badge-total">3 题</span>
<span class="badge badge-medium">中等 ×2</span>
<span class="badge badge-hard">困难 ×1</span>
💰 贪心算法
Greedy
<span class="badge badge-total">4 题</span>
<span class="badge badge-easy">简单 ×1</span>
<span class="badge badge-medium">中等 ×3</span>
🧮 动态规划
Dynamic Programming
<span class="badge badge-total">10 题</span>
<span class="badge badge-easy">简单 ×2</span>
<span class="badge badge-medium">中等 ×7</span>
<span class="badge badge-hard">困难 ×1</span>
📐 多维动态规划
Multidimensional DP
<span class="badge badge-total">5 题</span>
<span class="badge badge-medium">中等 ×5</span>
✨ 技巧
Tricks & Bit Manipulation
<span class="badge badge-total">5 题</span>
<span class="badge badge-easy">简单 ×2</span>
<span class="badge badge-medium">中等 ×3</span>题目来源：LeetCode 精选 100 道