This project stores the results of brainstorming sessions solving problems at Leetcode
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| Date | Task | Solution |
|---|---|---|
| 23.06.2022 | 🟡 2. Add Two Numbers | solution |
| 30.06.2022 | 🟢 217. Contains Duplicate | solution |
| 30.06.2022 | 🟢 234. Palindrome Linked List | solution |
| 30.06.2022 | 🟢 303. Range Sum Query - Immutable | solution |
| 07.07.2022 | 🟡 48. Rotate Image | solution |
| 15.07.2022 | 🟢 206. Reverse Linked List | solution |
| 15.07.2022 | 🟢 278. First Bad Version | solution |
| 21.07.2022 | 🟢 724. Find Pivot Index | solution |
| 01.09.2022 | 🟢 198. House Robber | solution |
| 13.10.2022 | 🟡 238. Product of Array Except Self | solution |
| 20.10.2022 | 🟡 287. Find the Duplicate Number | solution |
| 27.10.2022 | 🟡 79. Word Search | solution |
| 03.11.2022 | 🟡 784. Letter Case Permutation | solution |
| 17.11.2022 | 🟢 338. Counting Bits | solution |
| 17.11.2022 | 🟢 338. Counting Bits | solution |
| 09.03.2023 | 🔴 Яндекс.Контест 30. НОП с восстановлением ответа | solution |
| 23.03.2023 | 🟡 19. Remove Nth Node From End of List | solution |
| 27.04.2023 | 🟡 91. Decode Ways | solution |
If input array is sorted then
- Binary search
- Two pointers
If asked for all permutations/subsets then
- Backtracking
If given a tree then
- DFS
- BFS
If given a graph then
- DFS
- BFS
If given a linked list then
- Two pointers
If recursion is banned then
- Stack
If must solve in-place then
- Swap corresponding values
- Store one or more different values in the same pointer
If asked for maximum/minimum subarray/subset/options then
- Dynamic programming
If asked for top/least K items then
- Heap
If asked for common strings then
- Map
- Trie
Else
- Map/Set for O(1) time & O(n) space
- Sort input for O(nlogn) time and O(1) space