93d7b5d8ea
Valid Anagram
This one is a classic: `sorted(a) == sorted(b)`
Group Anagrams
Using product of prime numbers to create a key for anagrams is much faster than
sorting the characters in each word. It is also satisfyingly simple.
Encode and Decode Strings
My initial implementation was clumsy and prone to fail for edge-cases. A more
elegant solution is using something like:
```python
def encode(words):
return "".join("{}:{}".format(len(x), x) for x in words)
```
163 lines
6.7 KiB
Org Mode
163 lines
6.7 KiB
Org Mode
# This list is from:
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# https://www.teamblind.com/post/New-Year-Gift---Curated-List-of-Top-100-LeetCode-Questions-to-Save-Your-Time-OaM1orEU
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* Array
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** DONE Two Sum
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https://leetcode.com/problems/two-sum/
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** DONE Best Time to Buy and Sell Stock
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https://leetcode.com/problems/best-time-to-buy-and-sell-stock/
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** DONE Contains Duplicate
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https://leetcode.com/problems/contains-duplicate/
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** DONE Product of Array Except Self
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https://leetcode.com/problems/product-of-array-except-self/
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** DONE Maximum Subarray
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https://leetcode.com/problems/maximum-subarray/
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** DONE Maximum Product Subarray
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https://leetcode.com/problems/maximum-product-subarray/
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** DONE Find Minimum in Rotated Sorted Array
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https://leetcode.com/problems/find-minimum-in-rotated-sorted-array/
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** DONE Search in Rotated Sorted Array
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https://leetcode.com/problems/search-in-rotated-sorted-array/
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** DONE 3Sum
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https://leetcode.com/problems/3sum/
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** DONE Container With Most Water
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https://leetcode.com/problems/container-with-most-water/
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* Binary
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** DONE Sum of Two Integers
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https://leetcode.com/problems/sum-of-two-integers/
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** DONE Number of 1 Bits
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https://leetcode.com/problems/number-of-1-bits/
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** TODO Counting Bits
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https://leetcode.com/problems/counting-bits/
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** DONE Missing Number
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https://leetcode.com/problems/missing-number/
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** TODO Reverse Bits
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https://leetcode.com/problems/reverse-bits/
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* Dynamic Programming
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** DONE Climbing Stairs
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https://leetcode.com/problems/climbing-stairs/
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** TODO Coin Change
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https://leetcode.com/problems/coin-change/
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** TODO Longest Increasing Subsequence
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https://leetcode.com/problems/longest-increasing-subsequence/
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** TODO Longest Common Subsequence
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** DONE Word Break Problem
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https://leetcode.com/problems/word-break/
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** TODO Combination Sum
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https://leetcode.com/problems/combination-sum-iv/
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** TODO House Robber
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https://leetcode.com/problems/house-robber/
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** TODO House Robber II
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https://leetcode.com/problems/house-robber-ii/
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** TODO Decode Ways
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https://leetcode.com/problems/decode-ways/
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** TODO Unique Paths
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https://leetcode.com/problems/unique-paths/
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** TODO Jump Game
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https://leetcode.com/problems/jump-game/
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* Graph
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** DONE Clone Graph
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https://leetcode.com/problems/clone-graph/
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** DONE Course Schedule
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https://leetcode.com/problems/course-schedule/
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** TODO Pacific Atlantic Water Flow
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https://leetcode.com/problems/pacific-atlantic-water-flow/
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** DONE Number of Islands
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https://leetcode.com/problems/number-of-islands/
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** TODO Longest Consecutive Sequence
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https://leetcode.com/problems/longest-consecutive-sequence/
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** TODO Alien Dictionary (Leetcode Premium)
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https://leetcode.com/problems/alien-dictionary/
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** TODO Graph Valid Tree (Leetcode Premium)
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https://leetcode.com/problems/graph-valid-tree/
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** DONE Number of Connected Components in an Undirected Graph (Leetcode Premium)
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https://leetcode.com/problems/number-of-connected-components-in-an-undirected-graph/
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* Interval
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** TODO Insert Interval
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https://leetcode.com/problems/insert-interval/
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** DONE Merge Intervals
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https://leetcode.com/problems/merge-intervals/
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** TODO No Overlapping Intervals
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https://leetcode.com/problems/non-overlapping-intervals/
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** DONE Meeting Rooms (Leetcode Premium)
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https://leetcode.com/problems/meeting-rooms/
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** TODO Meeting Rooms II (Leetcode Premium)
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https://leetcode.com/problems/meeting-rooms-ii/
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* Linked List
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** DONE Reverse a Linked List
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https://leetcode.com/problems/reverse-linked-list/
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** DONE Detect Cycle in a Linked List
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https://leetcode.com/problems/linked-list-cycle/
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** DONE Merge Two Sorted Lists
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https://leetcode.com/problems/merge-two-sorted-lists/
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** DONE Merge K Sorted Lists
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https://leetcode.com/problems/merge-k-sorted-lists/
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** DONE Remove Nth Node From End Of List
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https://leetcode.com/problems/remove-nth-node-from-end-of-list/
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** DONE Reorder List
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https://leetcode.com/problems/reorder-list/
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* Matrix
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** DONE Set Matrix Zeroes
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https://leetcode.com/problems/set-matrix-zeroes/
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** DONE Spiral Matrix
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https://leetcode.com/problems/spiral-matrix/
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** TODO Rotate Image
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https://leetcode.com/problems/rotate-image/
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** DONE Word Search
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https://leetcode.com/problems/word-search/
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* String
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** TODO Longest Substring Without Repeating Characters
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https://leetcode.com/problems/longest-substring-without-repeating-characters/
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** TODO Longest Repeating Character Replacement
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https://leetcode.com/problems/longest-repeating-character-replacement/
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** TODO Minimum Window Substring
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https://leetcode.com/problems/minimum-window-substring/
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** DONE Valid Anagram
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https://leetcode.com/problems/valid-anagram/
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** DONE Group Anagrams
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https://leetcode.com/problems/group-anagrams/
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** DONE Valid Parentheses
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https://leetcode.com/problems/valid-parentheses/
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** DONE Valid Palindrome
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https://leetcode.com/problems/valid-palindrome/
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** TODO Longest Palindromic Substring
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https://leetcode.com/problems/longest-palindromic-substring/
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** TODO Palindromic Substrings
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https://leetcode.com/problems/palindromic-substrings/
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** DONE Encode and Decode Strings (Leetcode Premium)
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https://leetcode.com/problems/encode-and-decode-strings/
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* Tree
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** DONE Maximum Depth of Binary Tree
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https://leetcode.com/problems/maximum-depth-of-binary-tree/
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** DONE Same Tree
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https://leetcode.com/problems/same-tree/
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** DONE Invert/Flip Binary Tree
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https://leetcode.com/problems/invert-binary-tree/
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** DONE Binary Tree Maximum Path Sum
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https://leetcode.com/problems/binary-tree-maximum-path-sum/
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** DONE Binary Tree Level Order Traversal
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https://leetcode.com/problems/binary-tree-level-order-traversal/
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** DONE Serialize and Deserialize Binary Tree
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https://leetcode.com/problems/serialize-and-deserialize-binary-tree/
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** DONE Subtree of Another Tree
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https://leetcode.com/problems/subtree-of-another-tree/
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** TODO Construct Binary Tree from Preorder and Inorder Traversal
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https://leetcode.com/problems/construct-binary-tree-from-preorder-and-inorder-traversal/
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** TODO Validate Binary Search Tree
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https://leetcode.com/problems/validate-binary-search-tree/
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** TODO Kth Smallest Element in a BST
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https://leetcode.com/problems/kth-smallest-element-in-a-bst/
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** DONE Lowest Common Ancestor of BST
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https://leetcode.com/problems/lowest-common-ancestor-of-a-binary-search-tree/
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** DONE Implement Trie (Prefix Tree)
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https://leetcode.com/problems/implement-trie-prefix-tree/
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** DONE Add and Search Word
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https://leetcode.com/problems/add-and-search-word-data-structure-design/
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** DONE Word Search II
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https://leetcode.com/problems/word-search-ii/
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* Heap
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** DONE Merge K Sorted Lists
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https://leetcode.com/problems/merge-k-sorted-lists/
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** DONE Top K Frequent Elements
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https://leetcode.com/problems/top-k-frequent-elements/
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** DONE Find Median from Data Stream
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https://leetcode.com/problems/find-median-from-data-stream/
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