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LeetCode!
My personal guide to Leetcode
Array
Backtracking
Binary Search
- 744. Find Smallest Letter Greater Than Target
- 852. Peak Index in a Mountain Array
String
Design
- 251. Flatten 2D Vector
- 281. Zigzag Iterator
Hash Table
Linked List
- 2. Add Two Numbers
Unsorted
- 917. Reverse Only Letters
Math
Greedy
- 406. Queue Reconstruction by Height
- 861. Score After Flipping Matrix
Tree
- 701. Insert into a Binary Search Tree
- 897. Increasing Order Search Tree
Divide and Conquer
- 53. Maximum Subarray
Dynamic Programming
Depth first search
- 841. Keys and Rooms
Trie
- 677. Map Sum Pairs
Two pointer
- 42. Trapping Rain Water

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Divide and Conquer

53. Maximum Subarray

Approach 1: Store the sums up to index

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Last updated 7 years ago