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

LeetCode Topics

Linked List

0002-add-two-numbers
0019-remove-nth-node-from-end-of-list
0021-merge-two-sorted-lists
0025-reverse-nodes-in-k-group
0061-rotate-list
0083-remove-duplicates-from-sorted-list
0141-linked-list-cycle
0160-intersection-of-two-linked-lists
0203-remove-linked-list-elements
0206-reverse-linked-list
0234-palindrome-linked-list

Recursion

0002-add-two-numbers
0021-merge-two-sorted-lists
0025-reverse-nodes-in-k-group
0050-powx-n
0203-remove-linked-list-elements
0206-reverse-linked-list
0234-palindrome-linked-list

Hash Table

0001-two-sum
0003-longest-substring-without-repeating-characters
0013-roman-to-integer
0073-set-matrix-zeroes
0128-longest-consecutive-sequence
0141-linked-list-cycle
0160-intersection-of-two-linked-lists
0169-majority-element
0202-happy-number
0205-isomorphic-strings
0217-contains-duplicate
0219-contains-duplicate-ii
0268-missing-number
0349-intersection-of-two-arrays
0350-intersection-of-two-arrays-ii
0448-find-all-numbers-disappeared-in-an-array
0594-longest-harmonious-subsequence
0645-set-mismatch
1873-longest-nice-substring

Math

0002-add-two-numbers
0009-palindrome-number
0013-roman-to-integer
0048-rotate-image
0050-powx-n
0062-unique-paths
0067-add-binary
0069-sqrtx
0070-climbing-stairs
0168-excel-sheet-column-title
0202-happy-number
0268-missing-number

String

0003-longest-substring-without-repeating-characters
0013-roman-to-integer
0014-longest-common-prefix
0020-valid-parentheses
0067-add-binary
0125-valid-palindrome
0168-excel-sheet-column-title
0205-isomorphic-strings
1873-longest-nice-substring

Stack

0020-valid-parentheses
0094-binary-tree-inorder-traversal
0144-binary-tree-preorder-traversal
0225-implement-stack-using-queues
0234-palindrome-linked-list

Binary Search

0069-sqrtx
0074-search-a-2d-matrix
0222-count-complete-tree-nodes
0268-missing-number
0349-intersection-of-two-arrays
0350-intersection-of-two-arrays-ii
0493-reverse-pairs
0792-binary-search

Tree

0094-binary-tree-inorder-traversal
0100-same-tree
0101-symmetric-tree
0104-maximum-depth-of-binary-tree
0110-balanced-binary-tree
0111-minimum-depth-of-binary-tree
0112-path-sum
0144-binary-tree-preorder-traversal
0222-count-complete-tree-nodes
0226-invert-binary-tree

Depth-First Search

0094-binary-tree-inorder-traversal
0100-same-tree
0101-symmetric-tree
0104-maximum-depth-of-binary-tree
0110-balanced-binary-tree
0111-minimum-depth-of-binary-tree
0112-path-sum
0144-binary-tree-preorder-traversal
0226-invert-binary-tree

Binary Tree

0094-binary-tree-inorder-traversal
0100-same-tree
0101-symmetric-tree
0104-maximum-depth-of-binary-tree
0110-balanced-binary-tree
0111-minimum-depth-of-binary-tree
0112-path-sum
0144-binary-tree-preorder-traversal
0222-count-complete-tree-nodes
0226-invert-binary-tree

Breadth-First Search

0100-same-tree
0101-symmetric-tree
0104-maximum-depth-of-binary-tree
0111-minimum-depth-of-binary-tree
0112-path-sum
0226-invert-binary-tree

Bit Manipulation

0067-add-binary
0136-single-number
0190-reverse-bits
0191-number-of-1-bits
0222-count-complete-tree-nodes
0268-missing-number
0645-set-mismatch
1873-longest-nice-substring

Simulation

0067-add-binary

Dynamic Programming

0053-maximum-subarray
0062-unique-paths
0070-climbing-stairs
0118-pascals-triangle
0119-pascals-triangle-ii
0121-best-time-to-buy-and-sell-stock
0954-maximum-sum-circular-subarray

Memoization

0070-climbing-stairs

Trie

0014-longest-common-prefix

Array

0001-two-sum
0018-4sum
0048-rotate-image
0053-maximum-subarray
0056-merge-intervals
0073-set-matrix-zeroes
0074-search-a-2d-matrix
0075-sort-colors
0118-pascals-triangle
0119-pascals-triangle-ii
0121-best-time-to-buy-and-sell-stock
0128-longest-consecutive-sequence
0136-single-number
0169-majority-element
0217-contains-duplicate
0219-contains-duplicate-ii
0228-summary-ranges
0268-missing-number
0283-move-zeroes
0303-range-sum-query-immutable
0349-intersection-of-two-arrays
0350-intersection-of-two-arrays-ii
0414-third-maximum-number
0448-find-all-numbers-disappeared-in-an-array
0493-reverse-pairs
0594-longest-harmonious-subsequence
0643-maximum-average-subarray-i
0645-set-mismatch
0792-binary-search
0954-maximum-sum-circular-subarray

Two Pointers

0018-4sum
0019-remove-nth-node-from-end-of-list
0061-rotate-list
0075-sort-colors
0125-valid-palindrome
0141-linked-list-cycle
0160-intersection-of-two-linked-lists
0202-happy-number
0234-palindrome-linked-list
0283-move-zeroes
0349-intersection-of-two-arrays
0350-intersection-of-two-arrays-ii

Database

0175-combine-two-tables

Divide and Conquer

0053-maximum-subarray
0169-majority-element
0190-reverse-bits
0191-number-of-1-bits
0493-reverse-pairs
0954-maximum-sum-circular-subarray
1873-longest-nice-substring

Sorting

0018-4sum
0056-merge-intervals
0075-sort-colors
0169-majority-element
0217-contains-duplicate
0268-missing-number
0349-intersection-of-two-arrays
0350-intersection-of-two-arrays-ii
0414-third-maximum-number
0594-longest-harmonious-subsequence
0645-set-mismatch

Sliding Window

0003-longest-substring-without-repeating-characters
0219-contains-duplicate-ii
0594-longest-harmonious-subsequence
0643-maximum-average-subarray-i
1873-longest-nice-substring

Design

0225-implement-stack-using-queues
0303-range-sum-query-immutable

Queue

0225-implement-stack-using-queues
0954-maximum-sum-circular-subarray

Counting

0169-majority-element
0594-longest-harmonious-subsequence

Monotonic Queue

0954-maximum-sum-circular-subarray

Matrix

0048-rotate-image
0073-set-matrix-zeroes
0074-search-a-2d-matrix

Prefix Sum

0303-range-sum-query-immutable

Combinatorics

0062-unique-paths

Binary Indexed Tree

0493-reverse-pairs

Segment Tree

0493-reverse-pairs

Merge Sort

0493-reverse-pairs

Ordered Set

0493-reverse-pairs

Union Find

0128-longest-consecutive-sequence

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