LeetCode

Math

0029-divide-two-integers
0048-rotate-image
0069-sqrtx
0189-rotate-array
0268-missing-number
0367-valid-perfect-square

Binary Search

0033-search-in-rotated-sorted-array
0069-sqrtx
0074-search-a-2d-matrix
0268-missing-number
0287-find-the-duplicate-number
0367-valid-perfect-square
0882-peak-index-in-a-mountain-array

Array

0033-search-in-rotated-sorted-array
0048-rotate-image
0054-spiral-matrix
0074-search-a-2d-matrix
0075-sort-colors
0189-rotate-array
0268-missing-number
0287-find-the-duplicate-number
0643-maximum-average-subarray-i
0724-find-pivot-index
0882-peak-index-in-a-mountain-array
2737-row-with-maximum-ones

Two Pointers

0075-sort-colors
0189-rotate-array
0287-find-the-duplicate-number

Sorting

0075-sort-colors
0268-missing-number

Hash Table

0268-missing-number

Bit Manipulation

0029-divide-two-integers
0268-missing-number
0287-find-the-duplicate-number

Matrix

0048-rotate-image
0054-spiral-matrix
0074-search-a-2d-matrix
2737-row-with-maximum-ones

Prefix Sum

0724-find-pivot-index

Simulation

0054-spiral-matrix

Sliding Window

0643-maximum-average-subarray-i

LeetCode Topics

Math

0012-integer-to-roman
0029-divide-two-integers
0066-plus-one
0258-add-digits
2244-number-of-laser-beams-in-a-bank
2324-find-triangular-sum-of-an-array
2624-difference-between-element-sum-and-digit-sum-of-an-array
2630-alternating-digit-sum

Bit Manipulation

0029-divide-two-integers

String

0008-string-to-integer-atoi
0012-integer-to-roman
0014-longest-common-prefix
0028-find-the-index-of-the-first-occurrence-in-a-string
0049-group-anagrams
0125-valid-palindrome
0205-isomorphic-strings
0242-valid-anagram
0344-reverse-string
0345-reverse-vowels-of-a-string
0443-string-compression
0520-detect-capital
0647-palindromic-substrings
0742-to-lower-case
0807-custom-sort-string
0926-find-and-replace-pattern
0953-reverse-only-letters
1128-remove-all-adjacent-duplicates-in-string
1970-sorting-the-sentence
2021-remove-all-occurrences-of-a-substring
2076-sum-of-digits-of-string-after-convert
2168-check-if-numbers-are-ascending-in-a-sentence
2235-capitalize-the-title
2244-number-of-laser-beams-in-a-bank
2361-calculate-digit-sum-of-a-string
2406-decode-the-message
2471-minimum-amount-of-time-to-collect-garbage
2727-number-of-senior-citizens
3468-find-the-encrypted-string

Array

0035-search-insert-position
0049-group-anagrams
0066-plus-one
0088-merge-sorted-array
0118-pascals-triangle
0119-pascals-triangle-ii
0121-best-time-to-buy-and-sell-stock
0169-majority-element
0215-kth-largest-element-in-an-array
0217-contains-duplicate
0219-contains-duplicate-ii
0349-intersection-of-two-arrays
0350-intersection-of-two-arrays-ii
0414-third-maximum-number
0485-max-consecutive-ones
0532-k-diff-pairs-in-an-array
0566-reshape-the-matrix
0658-find-k-closest-elements
0926-find-and-replace-pattern
1019-squares-of-a-sorted-array
1293-three-consecutive-odds
1392-find-the-difference-of-two-arrays
1769-get-maximum-in-generated-array
1878-check-if-array-is-sorted-and-rotated
2132-convert-1d-array-into-2d-array
2144-maximum-difference-between-increasing-elements
2199-two-furthest-houses-with-different-colors
2244-number-of-laser-beams-in-a-bank
2324-find-triangular-sum-of-an-array
2331-intersection-of-multiple-arrays
2386-min-max-game
2471-minimum-amount-of-time-to-collect-garbage
2624-difference-between-element-sum-and-digit-sum-of-an-array
2727-number-of-senior-citizens
2836-neither-minimum-nor-maximum
3226-minimum-number-game

Hash Table

0012-integer-to-roman
0049-group-anagrams
0169-majority-element
0205-isomorphic-strings
0217-contains-duplicate
0219-contains-duplicate-ii
0242-valid-anagram
0349-intersection-of-two-arrays
0350-intersection-of-two-arrays-ii
0532-k-diff-pairs-in-an-array
0807-custom-sort-string
0926-find-and-replace-pattern
1392-find-the-difference-of-two-arrays
2331-intersection-of-multiple-arrays
2406-decode-the-message

Two Pointers

0028-find-the-index-of-the-first-occurrence-in-a-string
0088-merge-sorted-array
0125-valid-palindrome
0344-reverse-string
0345-reverse-vowels-of-a-string
0349-intersection-of-two-arrays
0350-intersection-of-two-arrays-ii
0443-string-compression
0532-k-diff-pairs-in-an-array
0647-palindromic-substrings
0658-find-k-closest-elements
0953-reverse-only-letters
1019-squares-of-a-sorted-array

Binary Search

0035-search-insert-position
0349-intersection-of-two-arrays
0350-intersection-of-two-arrays-ii
0532-k-diff-pairs-in-an-array
0658-find-k-closest-elements

Sorting

0049-group-anagrams
0088-merge-sorted-array
0169-majority-element
0215-kth-largest-element-in-an-array
0217-contains-duplicate
0242-valid-anagram
0349-intersection-of-two-arrays
0350-intersection-of-two-arrays-ii
0414-third-maximum-number
0532-k-diff-pairs-in-an-array
0658-find-k-closest-elements
0807-custom-sort-string
1019-squares-of-a-sorted-array
1970-sorting-the-sentence
2331-intersection-of-multiple-arrays
2836-neither-minimum-nor-maximum
3226-minimum-number-game

Sliding Window

0219-contains-duplicate-ii
0658-find-k-closest-elements

Heap (Priority Queue)

0215-kth-largest-element-in-an-array
0658-find-k-closest-elements
3226-minimum-number-game

Simulation

0258-add-digits
0566-reshape-the-matrix
1769-get-maximum-in-generated-array
2076-sum-of-digits-of-string-after-convert
2132-convert-1d-array-into-2d-array
2324-find-triangular-sum-of-an-array
2361-calculate-digit-sum-of-a-string
2386-min-max-game
3226-minimum-number-game

Divide and Conquer

0169-majority-element
0215-kth-largest-element-in-an-array

Counting

0169-majority-element
2331-intersection-of-multiple-arrays

Dynamic Programming

0118-pascals-triangle
0119-pascals-triangle-ii
0121-best-time-to-buy-and-sell-stock
0647-palindromic-substrings

Greedy

2199-two-furthest-houses-with-different-colors

Combinatorics

2324-find-triangular-sum-of-an-array

Quickselect

0215-kth-largest-element-in-an-array

Number Theory

0258-add-digits

Stack

1128-remove-all-adjacent-duplicates-in-string

Prefix Sum

2471-minimum-amount-of-time-to-collect-garbage

Trie

0014-longest-common-prefix

String Matching

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

Matrix

0566-reshape-the-matrix
2132-convert-1d-array-into-2d-array
2244-number-of-laser-beams-in-a-bank