LeetCode

• https://leetcode.com/u/727721euec087/

GeeksForGeeks

• https://www.geeksforgeeks.org/user/msanthoshhh/

LeetCode Topics

Array

0001-two-sum
0004-median-of-two-sorted-arrays
0011-container-with-most-water
0015-3sum
0026-remove-duplicates-from-sorted-array
0027-remove-element
0033-search-in-rotated-sorted-array
0035-search-insert-position
0037-sudoku-solver
0039-combination-sum
0040-combination-sum-ii
0042-trapping-rain-water
0045-jump-game-ii
0046-permutations
0048-rotate-image
0049-group-anagrams
0054-spiral-matrix
0055-jump-game
0056-merge-intervals
0057-insert-interval
0059-spiral-matrix-ii
0063-unique-paths-ii
0064-minimum-path-sum
0066-plus-one
0073-set-matrix-zeroes
0074-search-a-2d-matrix
0075-sort-colors
0078-subsets
0079-word-search
0085-maximal-rectangle
0088-merge-sorted-array
0108-convert-sorted-array-to-binary-search-tree
0120-triangle
0122-best-time-to-buy-and-sell-stock-ii
0139-word-break
0169-majority-element
0198-house-robber
0200-number-of-islands
0213-house-robber-ii
0215-kth-largest-element-in-an-array
0216-combination-sum-iii
0217-contains-duplicate
0219-contains-duplicate-ii
0229-majority-element-ii
0238-product-of-array-except-self
0268-missing-number
0283-move-zeroes
0287-find-the-duplicate-number
0322-coin-change
0330-patching-array
0334-increasing-triplet-subsequence
0347-top-k-frequent-elements
0349-intersection-of-two-arrays
0368-largest-divisible-subset
0377-combination-sum-iv
0485-max-consecutive-ones
0540-single-element-in-a-sorted-array

Hash Table

0001-two-sum
0003-longest-substring-without-repeating-characters
0012-integer-to-roman
0013-roman-to-integer
0017-letter-combinations-of-a-phone-number
0037-sudoku-solver
0049-group-anagrams
0073-set-matrix-zeroes
0076-minimum-window-substring
0133-clone-graph
0139-word-break
0169-majority-element
0217-contains-duplicate
0219-contains-duplicate-ii
0229-majority-element-ii
0242-valid-anagram
0268-missing-number
0347-top-k-frequent-elements
0349-intersection-of-two-arrays
0387-first-unique-character-in-a-string
0389-find-the-difference

Linked List

0002-add-two-numbers
0019-remove-nth-node-from-end-of-list
0021-merge-two-sorted-lists
0061-rotate-list
0206-reverse-linked-list
0234-palindrome-linked-list
0237-delete-node-in-a-linked-list
0328-odd-even-linked-list

Math

0002-add-two-numbers
0007-reverse-integer
0009-palindrome-number
0012-integer-to-roman
0013-roman-to-integer
0029-divide-two-integers
0043-multiply-strings
0048-rotate-image
0050-powx-n
0062-unique-paths
0066-plus-one
0070-climbing-stairs
0231-power-of-two
0268-missing-number
0279-perfect-squares
0326-power-of-three
0368-largest-divisible-subset
0371-sum-of-two-integers
1013-fibonacci-number

Recursion

0002-add-two-numbers
0021-merge-two-sorted-lists
0044-wildcard-matching
0050-powx-n
0206-reverse-linked-list
0231-power-of-two
0234-palindrome-linked-list
0326-power-of-three
0394-decode-string
1013-fibonacci-number

String

0003-longest-substring-without-repeating-characters
0005-longest-palindromic-substring
0006-zigzag-conversion
0012-integer-to-roman
0013-roman-to-integer
0014-longest-common-prefix
0017-letter-combinations-of-a-phone-number
0020-valid-parentheses
0022-generate-parentheses
0028-find-the-index-of-the-first-occurrence-in-a-string
0043-multiply-strings
0044-wildcard-matching
0049-group-anagrams
0058-length-of-last-word
0076-minimum-window-substring
0079-word-search
0115-distinct-subsequences
0139-word-break
0151-reverse-words-in-a-string
0242-valid-anagram
0344-reverse-string
0345-reverse-vowels-of-a-string
0387-first-unique-character-in-a-string
0389-find-the-difference
0392-is-subsequence
0394-decode-string
0516-longest-palindromic-subsequence

Sliding Window

0003-longest-substring-without-repeating-characters
0076-minimum-window-substring
0219-contains-duplicate-ii

Binary Search

0004-median-of-two-sorted-arrays
0033-search-in-rotated-sorted-array
0035-search-insert-position
0074-search-a-2d-matrix
0222-count-complete-tree-nodes
0268-missing-number
0287-find-the-duplicate-number
0349-intersection-of-two-arrays
0540-single-element-in-a-sorted-array

Divide and Conquer

0004-median-of-two-sorted-arrays
0108-convert-sorted-array-to-binary-search-tree
0169-majority-element
0191-number-of-1-bits
0215-kth-largest-element-in-an-array
0347-top-k-frequent-elements

Two Pointers

0005-longest-palindromic-substring
0011-container-with-most-water
0015-3sum
0019-remove-nth-node-from-end-of-list
0026-remove-duplicates-from-sorted-array
0027-remove-element
0028-find-the-index-of-the-first-occurrence-in-a-string
0042-trapping-rain-water
0061-rotate-list
0075-sort-colors
0088-merge-sorted-array
0151-reverse-words-in-a-string
0234-palindrome-linked-list
0283-move-zeroes
0287-find-the-duplicate-number
0344-reverse-string
0345-reverse-vowels-of-a-string
0349-intersection-of-two-arrays
0392-is-subsequence

Dynamic Programming

0005-longest-palindromic-substring
0022-generate-parentheses
0042-trapping-rain-water
0044-wildcard-matching
0045-jump-game-ii
0055-jump-game
0062-unique-paths
0063-unique-paths-ii
0064-minimum-path-sum
0070-climbing-stairs
0085-maximal-rectangle
0115-distinct-subsequences
0120-triangle
0122-best-time-to-buy-and-sell-stock-ii
0124-binary-tree-maximum-path-sum
0139-word-break
0198-house-robber
0213-house-robber-ii
0279-perfect-squares
0322-coin-change
0338-counting-bits
0368-largest-divisible-subset
0377-combination-sum-iv
0392-is-subsequence
0516-longest-palindromic-subsequence
1013-fibonacci-number

Greedy

0011-container-with-most-water
0044-wildcard-matching
0045-jump-game-ii
0055-jump-game
0122-best-time-to-buy-and-sell-stock-ii
0330-patching-array
0334-increasing-triplet-subsequence

Trie

0014-longest-common-prefix
0139-word-break
0386-lexicographical-numbers

Backtracking

0017-letter-combinations-of-a-phone-number
0022-generate-parentheses
0037-sudoku-solver
0039-combination-sum
0040-combination-sum-ii
0046-permutations
0078-subsets
0079-word-search
0216-combination-sum-iii

String Matching

0028-find-the-index-of-the-first-occurrence-in-a-string

Bit Manipulation

0029-divide-two-integers
0078-subsets
0191-number-of-1-bits
0201-bitwise-and-of-numbers-range
0222-count-complete-tree-nodes
0231-power-of-two
0268-missing-number
0287-find-the-duplicate-number
0338-counting-bits
0371-sum-of-two-integers
0389-find-the-difference
0476-number-complement

Sorting

0015-3sum
0049-group-anagrams
0056-merge-intervals
0075-sort-colors
0088-merge-sorted-array
0169-majority-element
0215-kth-largest-element-in-an-array
0217-contains-duplicate
0229-majority-element-ii
0242-valid-anagram
0268-missing-number
0347-top-k-frequent-elements
0349-intersection-of-two-arrays
0368-largest-divisible-subset
0389-find-the-difference

Matrix

0037-sudoku-solver
0048-rotate-image
0054-spiral-matrix
0059-spiral-matrix-ii
0063-unique-paths-ii
0064-minimum-path-sum
0073-set-matrix-zeroes
0074-search-a-2d-matrix
0079-word-search
0085-maximal-rectangle
0200-number-of-islands

Memoization

0070-climbing-stairs
0139-word-break
1013-fibonacci-number

Tree

0101-symmetric-tree
0102-binary-tree-level-order-traversal
0103-binary-tree-zigzag-level-order-traversal
0104-maximum-depth-of-binary-tree
0108-convert-sorted-array-to-binary-search-tree
0124-binary-tree-maximum-path-sum
0222-count-complete-tree-nodes
0226-invert-binary-tree
0230-kth-smallest-element-in-a-bst

Breadth-First Search

0101-symmetric-tree
0102-binary-tree-level-order-traversal
0103-binary-tree-zigzag-level-order-traversal
0104-maximum-depth-of-binary-tree
0133-clone-graph
0200-number-of-islands
0226-invert-binary-tree
0279-perfect-squares
0322-coin-change

Binary Tree

0101-symmetric-tree
0102-binary-tree-level-order-traversal
0103-binary-tree-zigzag-level-order-traversal
0104-maximum-depth-of-binary-tree
0108-convert-sorted-array-to-binary-search-tree
0124-binary-tree-maximum-path-sum
0222-count-complete-tree-nodes
0226-invert-binary-tree
0230-kth-smallest-element-in-a-bst

Binary Search Tree

0108-convert-sorted-array-to-binary-search-tree
0230-kth-smallest-element-in-a-bst

Stack

0020-valid-parentheses
0042-trapping-rain-water
0085-maximal-rectangle
0234-palindrome-linked-list
0394-decode-string

Monotonic Stack

0042-trapping-rain-water
0085-maximal-rectangle

Simulation

0043-multiply-strings
0054-spiral-matrix
0059-spiral-matrix-ii

Combinatorics

0062-unique-paths

Depth-First Search

0079-word-search
0101-symmetric-tree
0104-maximum-depth-of-binary-tree
0124-binary-tree-maximum-path-sum
0133-clone-graph
0200-number-of-islands
0226-invert-binary-tree
0230-kth-smallest-element-in-a-bst
0386-lexicographical-numbers

Counting

0169-majority-element
0229-majority-element-ii
0347-top-k-frequent-elements
0387-first-unique-character-in-a-string

Graph

0133-clone-graph

Union Find

0200-number-of-islands

Heap (Priority Queue)

0215-kth-largest-element-in-an-array
0347-top-k-frequent-elements

Quickselect

0215-kth-largest-element-in-an-array
0347-top-k-frequent-elements

Prefix Sum

0238-product-of-array-except-self

Queue

0387-first-unique-character-in-a-string

Bucket Sort

0347-top-k-frequent-elements