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A collection of LeetCode questions to ace the coding interview! - Created using LeetHub v2

LeetCode Topics

Array

0001-two-sum
0004-median-of-two-sorted-arrays
0011-container-with-most-water
0033-search-in-rotated-sorted-array
0042-trapping-rain-water
0049-group-anagrams
0074-search-a-2d-matrix
0075-sort-colors
0121-best-time-to-buy-and-sell-stock
0128-longest-consecutive-sequence
0153-find-minimum-in-rotated-sorted-array
0167-two-sum-ii-input-array-is-sorted
0209-minimum-size-subarray-sum
0217-contains-duplicate
0238-product-of-array-except-self
0287-find-the-duplicate-number
0347-top-k-frequent-elements
0792-binary-search
0907-koko-eating-bananas
0940-fruit-into-baskets
1019-squares-of-a-sorted-array
1046-max-consecutive-ones-iii

Hash Table

0001-two-sum
0003-longest-substring-without-repeating-characters
0049-group-anagrams
0128-longest-consecutive-sequence
0138-copy-list-with-random-pointer
0141-linked-list-cycle
0142-linked-list-cycle-ii
0146-lru-cache
0202-happy-number
0217-contains-duplicate
0242-valid-anagram
0347-top-k-frequent-elements
0424-longest-repeating-character-replacement
0438-find-all-anagrams-in-a-string
0567-permutation-in-string
0940-fruit-into-baskets
1023-time-based-key-value-store

Sorting

0049-group-anagrams
0075-sort-colors
0217-contains-duplicate
0242-valid-anagram
0347-top-k-frequent-elements
1019-squares-of-a-sorted-array

String

0003-longest-substring-without-repeating-characters
0049-group-anagrams
0125-valid-palindrome
0242-valid-anagram
0424-longest-repeating-character-replacement
0438-find-all-anagrams-in-a-string
0567-permutation-in-string
1023-time-based-key-value-store

Divide and Conquer

0004-median-of-two-sorted-arrays
0023-merge-k-sorted-lists
0347-top-k-frequent-elements

Heap (Priority Queue)

0023-merge-k-sorted-lists
0347-top-k-frequent-elements

Bucket Sort

0347-top-k-frequent-elements

Counting

0347-top-k-frequent-elements

Quickselect

0347-top-k-frequent-elements

Prefix Sum

0209-minimum-size-subarray-sum
0238-product-of-array-except-self
1046-max-consecutive-ones-iii

Union Find

0128-longest-consecutive-sequence

Two Pointers

0011-container-with-most-water
0019-remove-nth-node-from-end-of-list
0042-trapping-rain-water
0075-sort-colors
0125-valid-palindrome
0141-linked-list-cycle
0142-linked-list-cycle-ii
0143-reorder-list
0167-two-sum-ii-input-array-is-sorted
0202-happy-number
0234-palindrome-linked-list
0287-find-the-duplicate-number
0567-permutation-in-string
0908-middle-of-the-linked-list
1019-squares-of-a-sorted-array

Binary Search

0004-median-of-two-sorted-arrays
0033-search-in-rotated-sorted-array
0074-search-a-2d-matrix
0153-find-minimum-in-rotated-sorted-array
0167-two-sum-ii-input-array-is-sorted
0209-minimum-size-subarray-sum
0287-find-the-duplicate-number
0792-binary-search
0907-koko-eating-bananas
1023-time-based-key-value-store
1046-max-consecutive-ones-iii

Greedy

0011-container-with-most-water

Matrix

0074-search-a-2d-matrix

Dynamic Programming

0042-trapping-rain-water
0121-best-time-to-buy-and-sell-stock

Stack

0042-trapping-rain-water
0143-reorder-list
0234-palindrome-linked-list

Monotonic Stack

0042-trapping-rain-water

Design

0146-lru-cache
1023-time-based-key-value-store

Sliding Window

0003-longest-substring-without-repeating-characters
0209-minimum-size-subarray-sum
0424-longest-repeating-character-replacement
0438-find-all-anagrams-in-a-string
0567-permutation-in-string
0940-fruit-into-baskets
1046-max-consecutive-ones-iii

Linked List

0002-add-two-numbers
0019-remove-nth-node-from-end-of-list
0021-merge-two-sorted-lists
0023-merge-k-sorted-lists
0092-reverse-linked-list-ii
0138-copy-list-with-random-pointer
0141-linked-list-cycle
0142-linked-list-cycle-ii
0143-reorder-list
0146-lru-cache
0206-reverse-linked-list
0234-palindrome-linked-list
0908-middle-of-the-linked-list

Recursion

0002-add-two-numbers
0021-merge-two-sorted-lists
0143-reorder-list
0206-reverse-linked-list
0234-palindrome-linked-list

Math

0002-add-two-numbers
0202-happy-number

Tree

0100-same-tree
0103-binary-tree-zigzag-level-order-traversal
0104-maximum-depth-of-binary-tree
0110-balanced-binary-tree
0111-minimum-depth-of-binary-tree
0112-path-sum
0199-binary-tree-right-side-view
0226-invert-binary-tree
0543-diameter-of-binary-tree

Breadth-First Search

0100-same-tree
0103-binary-tree-zigzag-level-order-traversal
0104-maximum-depth-of-binary-tree
0111-minimum-depth-of-binary-tree
0112-path-sum
0199-binary-tree-right-side-view
0226-invert-binary-tree

Binary Tree

0100-same-tree
0103-binary-tree-zigzag-level-order-traversal
0104-maximum-depth-of-binary-tree
0110-balanced-binary-tree
0111-minimum-depth-of-binary-tree
0112-path-sum
0199-binary-tree-right-side-view
0226-invert-binary-tree
0543-diameter-of-binary-tree

Depth-First Search

0100-same-tree
0104-maximum-depth-of-binary-tree
0110-balanced-binary-tree
0111-minimum-depth-of-binary-tree
0112-path-sum
0199-binary-tree-right-side-view
0226-invert-binary-tree
0543-diameter-of-binary-tree

Bit Manipulation

0287-find-the-duplicate-number

Doubly-Linked List

0146-lru-cache

Merge Sort

0023-merge-k-sorted-lists

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