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9 | 9 |
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10 | 10 | | # | 题目 | 标签 | 难度 |
|
11 | 11 | | :-: | - | - | :-: |
|
| 12 | +| 1797 | [设计一个验证系统](../../problems/design-authentication-manager) | [[设计](../design/README.md)] [[哈希表](../hash-table/README.md)] | Medium | |
| 13 | +| 1756 | [设计最近使用(MRU)队列](../../problems/design-most-recently-used-queue) 🔒 | [[设计](../design/README.md)] [[数组](../array/README.md)] | Medium | |
| 14 | +| 1670 | [设计前中后队列](../../problems/design-front-middle-back-queue) | [[设计](../design/README.md)] [[链表](../linked-list/README.md)] | Medium | |
| 15 | +| 1656 | [设计有序流](../../problems/design-an-ordered-stream) | [[设计](../design/README.md)] [[数组](../array/README.md)] | Easy | |
| 16 | +| 1628 | [设计带解析函数的表达式树](../../problems/design-an-expression-tree-with-evaluate-function) 🔒 | [[树](../tree/README.md)] [[设计](../design/README.md)] | Medium | |
| 17 | +| 1622 | [奇妙序列](../../problems/fancy-sequence) | [[设计](../design/README.md)] [[数学](../math/README.md)] | Hard | |
| 18 | +| 1603 | [设计停车系统](../../problems/design-parking-system) | [[设计](../design/README.md)] | Easy | |
| 19 | +| 1600 | [皇位继承顺序](../../problems/throne-inheritance) | [[树](../tree/README.md)] [[设计](../design/README.md)] | Medium | |
| 20 | +| 1586 | [二叉搜索树迭代器 II](../../problems/binary-search-tree-iterator-ii) 🔒 | [[树](../tree/README.md)] [[设计](../design/README.md)] | Medium | |
| 21 | +| 1500 | [设计文件分享系统](../../problems/design-a-file-sharing-system) 🔒 | [[设计](../design/README.md)] [[数组](../array/README.md)] | Medium | |
| 22 | +| 1472 | [设计浏览器历史记录](../../problems/design-browser-history) | [[设计](../design/README.md)] | Medium | |
| 23 | +| 1429 | [第一个唯一数字](../../problems/first-unique-number) 🔒 | [[设计](../design/README.md)] [[哈希表](../hash-table/README.md)] | Medium | |
| 24 | +| 1396 | [设计地铁系统](../../problems/design-underground-system) | [[设计](../design/README.md)] | Medium | |
| 25 | +| 1381 | [设计一个支持增量操作的栈](../../problems/design-a-stack-with-increment-operation) | [[栈](../stack/README.md)] [[设计](../design/README.md)] | Medium | |
| 26 | +| 1357 | [每隔 n 个顾客打折](../../problems/apply-discount-every-n-orders) | [[设计](../design/README.md)] | Medium | |
| 27 | +| 1352 | [最后 K 个数的乘积](../../problems/product-of-the-last-k-numbers) | [[设计](../design/README.md)] [[数组](../array/README.md)] | Medium | |
| 28 | +| 1348 | [推文计数](../../problems/tweet-counts-per-frequency) | [[设计](../design/README.md)] | Medium | |
| 29 | +| 1286 | [字母组合迭代器](../../problems/iterator-for-combination) | [[设计](../design/README.md)] [[回溯算法](../backtracking/README.md)] | Medium | |
| 30 | +| 1244 | [力扣排行榜](../../problems/design-a-leaderboard) 🔒 | [[排序](../sort/README.md)] [[设计](../design/README.md)] [[哈希表](../hash-table/README.md)] | Medium | |
| 31 | +| 1206 | [设计跳表](../../problems/design-skiplist) | [[设计](../design/README.md)] | Hard | |
| 32 | +| 1172 | [餐盘栈](../../problems/dinner-plate-stacks) | [[设计](../design/README.md)] | Hard | |
| 33 | +| 1166 | [设计文件系统](../../problems/design-file-system) 🔒 | [[设计](../design/README.md)] [[哈希表](../hash-table/README.md)] | Medium | |
| 34 | +| 716 | [最大栈](../../problems/max-stack) 🔒 | [[设计](../design/README.md)] | Easy | |
| 35 | +| 707 | [设计链表](../../problems/design-linked-list) | [[设计](../design/README.md)] [[链表](../linked-list/README.md)] | Medium | |
| 36 | +| 706 | [设计哈希映射](../../problems/design-hashmap) | [[设计](../design/README.md)] [[哈希表](../hash-table/README.md)] | Easy | |
| 37 | +| 705 | [设计哈希集合](../../problems/design-hashset) | [[设计](../design/README.md)] [[哈希表](../hash-table/README.md)] | Easy | |
| 38 | +| 703 | [数据流中的第 K 大元素](../../problems/kth-largest-element-in-a-stream) | [[堆](../heap/README.md)] [[设计](../design/README.md)] | Easy | |
| 39 | +| 642 | [设计搜索自动补全系统](../../problems/design-search-autocomplete-system) 🔒 | [[设计](../design/README.md)] [[字典树](../trie/README.md)] | Hard | |
| 40 | +| 641 | [设计循环双端队列](../../problems/design-circular-deque) | [[设计](../design/README.md)] [[队列](../queue/README.md)] | Medium | |
| 41 | +| 635 | [设计日志存储系统](../../problems/design-log-storage-system) 🔒 | [[设计](../design/README.md)] [[字符串](../string/README.md)] | Medium | |
| 42 | +| 631 | [设计 Excel 求和公式](../../problems/design-excel-sum-formula) 🔒 | [[设计](../design/README.md)] | Hard | |
| 43 | +| 622 | [设计循环队列](../../problems/design-circular-queue) | [[设计](../design/README.md)] [[队列](../queue/README.md)] | Medium | |
| 44 | +| 604 | [迭代压缩字符串](../../problems/design-compressed-string-iterator) 🔒 | [[设计](../design/README.md)] | Easy | |
| 45 | +| 588 | [设计内存文件系统](../../problems/design-in-memory-file-system) 🔒 | [[设计](../design/README.md)] | Hard | |
| 46 | +| 460 | [LFU 缓存](../../problems/lfu-cache) | [[设计](../design/README.md)] | Hard | |
| 47 | +| 432 | [全 O(1) 的数据结构](../../problems/all-oone-data-structure) | [[设计](../design/README.md)] | Hard | |
| 48 | +| 381 | [O(1) 时间插入、删除和获取随机元素 - 允许重复](../../problems/insert-delete-getrandom-o1-duplicates-allowed) | [[设计](../design/README.md)] [[数组](../array/README.md)] [[哈希表](../hash-table/README.md)] | Hard | |
| 49 | +| 380 | [常数时间插入、删除和获取随机元素](../../problems/insert-delete-getrandom-o1) | [[设计](../design/README.md)] [[数组](../array/README.md)] [[哈希表](../hash-table/README.md)] | Medium | |
| 50 | +| 379 | [电话目录管理系统](../../problems/design-phone-directory) 🔒 | [[设计](../design/README.md)] [[链表](../linked-list/README.md)] | Medium | |
| 51 | +| 362 | [敲击计数器](../../problems/design-hit-counter) 🔒 | [[设计](../design/README.md)] | Medium | |
| 52 | +| 359 | [日志速率限制器](../../problems/logger-rate-limiter) 🔒 | [[设计](../design/README.md)] [[哈希表](../hash-table/README.md)] | Easy | |
| 53 | +| 355 | [设计推特](../../problems/design-twitter) | [[堆](../heap/README.md)] [[设计](../design/README.md)] [[哈希表](../hash-table/README.md)] | Medium | |
| 54 | +| 353 | [贪吃蛇](../../problems/design-snake-game) 🔒 | [[设计](../design/README.md)] [[队列](../queue/README.md)] | Medium | |
| 55 | +| 348 | [设计井字棋](../../problems/design-tic-tac-toe) 🔒 | [[设计](../design/README.md)] | Medium | |
| 56 | +| 346 | [数据流中的移动平均值](../../problems/moving-average-from-data-stream) 🔒 | [[设计](../design/README.md)] [[队列](../queue/README.md)] | Easy | |
| 57 | +| 341 | [扁平化嵌套列表迭代器](../../problems/flatten-nested-list-iterator) | [[栈](../stack/README.md)] [[设计](../design/README.md)] | Medium | |
| 58 | +| 297 | [二叉树的序列化与反序列化](../../problems/serialize-and-deserialize-binary-tree) | [[树](../tree/README.md)] [[设计](../design/README.md)] | Hard | |
| 59 | +| 295 | [数据流的中位数](../../problems/find-median-from-data-stream) | [[堆](../heap/README.md)] [[设计](../design/README.md)] | Hard | |
| 60 | +| 288 | [单词的唯一缩写](../../problems/unique-word-abbreviation) 🔒 | [[设计](../design/README.md)] [[哈希表](../hash-table/README.md)] | Medium | |
| 61 | +| 284 | [顶端迭代器](../../problems/peeking-iterator) | [[设计](../design/README.md)] | Medium | |
| 62 | +| 281 | [锯齿迭代器](../../problems/zigzag-iterator) 🔒 | [[设计](../design/README.md)] | Medium | |
| 63 | +| 251 | [展开二维向量](../../problems/flatten-2d-vector) 🔒 | [[设计](../design/README.md)] | Medium | |
| 64 | +| 244 | [最短单词距离 II](../../problems/shortest-word-distance-ii) 🔒 | [[设计](../design/README.md)] [[哈希表](../hash-table/README.md)] | Medium | |
| 65 | +| 232 | [用栈实现队列](../../problems/implement-queue-using-stacks) | [[栈](../stack/README.md)] [[设计](../design/README.md)] | Easy | |
| 66 | +| 225 | [用队列实现栈](../../problems/implement-stack-using-queues) | [[栈](../stack/README.md)] [[设计](../design/README.md)] | Easy | |
| 67 | +| 211 | [添加与搜索单词 - 数据结构设计](../../problems/design-add-and-search-words-data-structure) | [[深度优先搜索](../depth-first-search/README.md)] [[设计](../design/README.md)] [[字典树](../trie/README.md)] [[回溯算法](../backtracking/README.md)] | Medium | |
| 68 | +| 208 | [实现 Trie (前缀树)](../../problems/implement-trie-prefix-tree) | [[设计](../design/README.md)] [[字典树](../trie/README.md)] | Medium | |
| 69 | +| 173 | [二叉搜索树迭代器](../../problems/binary-search-tree-iterator) | [[栈](../stack/README.md)] [[树](../tree/README.md)] [[设计](../design/README.md)] | Medium | |
| 70 | +| 170 | [两数之和 III - 数据结构设计](../../problems/two-sum-iii-data-structure-design) 🔒 | [[设计](../design/README.md)] [[哈希表](../hash-table/README.md)] | Easy | |
| 71 | +| 155 | [最小栈](../../problems/min-stack) | [[栈](../stack/README.md)] [[设计](../design/README.md)] | Easy | |
| 72 | +| 146 | [LRU 缓存机制](../../problems/lru-cache) | [[设计](../design/README.md)] | Medium | |
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