Design (35 completed)
| # | Title | Level | Cats | Solution | Languages | Date Complete |
|---|---|---|---|---|---|---|
| 155 | Min Stack | Medium | N150 | solution | py | Jun 16, 2024 |
| 170 | Two Sum III - Data structure design | Easy | solution | py | Jul 31, 2024 | |
| 173 | Binary Search Tree Iterator | Medium | solution | py | Jun 26, 2024 | |
| 208 | Implement Trie (Prefix Tree) | Medium | B75, N150 | solution | py | Jun 27, 2024 |
| 211 | Design Add and Search Words Data Structure | Medium | B75, N150 | solution | py | Jun 27, 2024 |
| 251 | Flatten 2D Vector | Medium | solution | py | May 22, 2024 | |
| 271 | Encode and Decode Strings | Medium | B75, N150 | solution | py | Jun 13, 2024 |
| 341 | Flatten Nested List Iterator | Medium | solution | java | Jul 02, 2024 | |
| 348 | Design Tic-Tac-Toe | Medium | solution | py | Jul 05, 2024 | |
| 353 | Design Snake Game | Medium | solution | py | Jun 28, 2024 | |
| 362 | Design Hit Counter | Medium | solution | py | Oct 24, 2024 | |
| 380 | Insert Delete GetRandom O(1) | Medium | solution | java | Jul 06, 2024 | |
| 381 | Insert Delete GetRandom O(1) - Duplicates allowed | Hard | solution | java | Jul 06, 2024 | |
| 384 | Shuffle an Array | Medium | solution | py | Jun 29, 2024 | |
| 431 | Encode N-ary Tree to Binary Tree | Hard | solution | java, py | Jun 28, 2024 | |
| 535 | Encode and Decode TinyURL | Medium | solution | py | Jun 07, 2024 | |
| 622 | Design Circular Queue | Medium | solution | py | Jul 06, 2024 | |
| 641 | Design Circular Deque | Medium | solution | py | Sep 30, 2024 | |
| 676 | Implement Magic Dictionary | Medium | solution | py | Jun 27, 2024 | |
| 703 | Kth Largest Element in a Stream | Easy | Daily, N150 | solution | py | Jul 05, 2024 |
| 707 | Design Linked List | Medium | solution | java | Jun 22, 2024 | |
| 729 | My Calendar I | Medium | Daily | solution | py | Sep 26, 2024 |
| 895 | Maximum Frequency Stack | Hard | solution | java, py | Jul 11, 2024 | |
| 919 | Complete Binary Tree Inserter | Medium | solution | py | Jul 05, 2024 | |
| 981 | Time Based Key-Value Store | Medium | N150 | solution | py | Oct 24, 2024 |
| 1166 | Design File System | Medium | solution | py | Jun 28, 2024 | |
| 1381 | Design a Stack With Increment Operation | Medium | Daily | solution | py | Jul 06, 2024 |
| 1429 | First Unique Number | Medium | solution | py | Oct 26, 2024 | |
| 1472 | Design Browser History | Medium | solution | py | Jul 06, 2024 | |
| 1570 | Dot Product of Two Sparse Vectors | Medium | solution | c, java, py | Jun 06, 2024 | |
| 1804 | Implement Trie II (Prefix Tree) | Medium | Weekly Premium | solution | py | Jun 27, 2024 |
| 2013 | Detect Squares | Medium | N150 | solution | py | Jun 28, 2024 |
| 2349 | Design a Number Container System | Medium | solution | py | Oct 28, 2024 | |
| 2671 | Frequency Tracker | Medium | solution | py | Jun 28, 2024 | |
| 3242 | Design Neighbor Sum Service | Easy | solution | py | Aug 04, 2024 |