Collection of LeetCode solutions

LeetCode Topics

Array

0031-next-permutation
0053-maximum-subarray
0055-jump-game
0056-merge-intervals
0074-search-a-2d-matrix
0135-candy
0169-majority-element
0189-rotate-array
0209-minimum-size-subarray-sum
0215-kth-largest-element-in-an-array
0229-majority-element-ii
0238-product-of-array-except-self
0287-find-the-duplicate-number
0303-range-sum-query-immutable
0347-top-k-frequent-elements
0435-non-overlapping-intervals
0455-assign-cookies
0599-minimum-index-sum-of-two-lists
0724-find-pivot-index
0966-binary-subarrays-with-sum
1603-running-sum-of-1d-array
1786-count-the-number-of-consistent-strings
2163-kth-distinct-string-in-an-array
2231-find-first-palindromic-string-in-the-array
2232-adding-spaces-to-a-string
2292-counting-words-with-a-given-prefix
2502-sort-the-people
2714-left-and-right-sum-differences
3427-special-array-ii
3429-special-array-i
3594-identify-the-largest-outlier-in-an-array

Two Pointers

0028-find-the-index-of-the-first-occurrence-in-a-string
0031-next-permutation
0151-reverse-words-in-a-string
0165-compare-version-numbers
0189-rotate-array
0287-find-the-duplicate-number
0455-assign-cookies
1566-check-if-a-word-occurs-as-a-prefix-of-any-word-in-a-sentence
2231-find-first-palindromic-string-in-the-array
2232-adding-spaces-to-a-string

Greedy

0055-jump-game
0135-candy
0435-non-overlapping-intervals
0455-assign-cookies
0957-minimum-add-to-make-parentheses-valid

Sorting

0056-merge-intervals
0169-majority-element
0215-kth-largest-element-in-an-array
0229-majority-element-ii
0242-valid-anagram
0347-top-k-frequent-elements
0435-non-overlapping-intervals
0455-assign-cookies
2502-sort-the-people

Dynamic Programming

0053-maximum-subarray
0055-jump-game
0435-non-overlapping-intervals

Prefix Sum

0209-minimum-size-subarray-sum
0238-product-of-array-except-self
0303-range-sum-query-immutable
0724-find-pivot-index
0966-binary-subarrays-with-sum
1603-running-sum-of-1d-array
2714-left-and-right-sum-differences
3427-special-array-ii

Design

0303-range-sum-query-immutable

Divide and Conquer

0053-maximum-subarray
0169-majority-element
0215-kth-largest-element-in-an-array
0347-top-k-frequent-elements

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

Hash Table

0003-longest-substring-without-repeating-characters
0017-letter-combinations-of-a-phone-number
0169-majority-element
0229-majority-element-ii
0242-valid-anagram
0347-top-k-frequent-elements
0599-minimum-index-sum-of-two-lists
0966-binary-subarrays-with-sum
1786-count-the-number-of-consistent-strings
1890-sum-of-beauty-of-all-substrings
2163-kth-distinct-string-in-an-array
2502-sort-the-people
3594-identify-the-largest-outlier-in-an-array

Bucket Sort

0347-top-k-frequent-elements

Counting

0169-majority-element
0229-majority-element-ii
0347-top-k-frequent-elements
1786-count-the-number-of-consistent-strings
1890-sum-of-beauty-of-all-substrings
2163-kth-distinct-string-in-an-array
3594-identify-the-largest-outlier-in-an-array

Binary Search

0074-search-a-2d-matrix
0209-minimum-size-subarray-sum
0287-find-the-duplicate-number
3427-special-array-ii

Bit Manipulation

0287-find-the-duplicate-number
1786-count-the-number-of-consistent-strings

Matrix

0074-search-a-2d-matrix

String

0003-longest-substring-without-repeating-characters
0017-letter-combinations-of-a-phone-number
0028-find-the-index-of-the-first-occurrence-in-a-string
0038-count-and-say
0151-reverse-words-in-a-string
0165-compare-version-numbers
0242-valid-anagram
0459-repeated-substring-pattern
0599-minimum-index-sum-of-two-lists
0851-goat-latin
0957-minimum-add-to-make-parentheses-valid
1566-check-if-a-word-occurs-as-a-prefix-of-any-word-in-a-sentence
1786-count-the-number-of-consistent-strings
1890-sum-of-beauty-of-all-substrings
2163-kth-distinct-string-in-an-array
2231-find-first-palindromic-string-in-the-array
2232-adding-spaces-to-a-string
2292-counting-words-with-a-given-prefix
2502-sort-the-people

String Matching

0028-find-the-index-of-the-first-occurrence-in-a-string
0459-repeated-substring-pattern
1566-check-if-a-word-occurs-as-a-prefix-of-any-word-in-a-sentence
2292-counting-words-with-a-given-prefix

Stack

0957-minimum-add-to-make-parentheses-valid

Simulation

2232-adding-spaces-to-a-string

Backtracking

0017-letter-combinations-of-a-phone-number

Enumeration

3594-identify-the-largest-outlier-in-an-array

Math

0189-rotate-array

Sliding Window

0003-longest-substring-without-repeating-characters
0209-minimum-size-subarray-sum
0966-binary-subarrays-with-sum