leetcode

LeetCode Topics

Math

0268-missing-number
0371-sum-of-two-integers
1889-check-if-number-is-a-sum-of-powers-of-three
2106-find-greatest-common-divisor-of-array
2491-smallest-even-multiple
3859-maximum-product-of-two-digits
3995-gcd-of-odd-and-even-sums

Array

0026-remove-duplicates-from-sorted-array
0027-remove-element
0033-search-in-rotated-sorted-array
0035-search-insert-position
0074-search-a-2d-matrix
0075-sort-colors
0080-remove-duplicates-from-sorted-array-ii
0081-search-in-rotated-sorted-array-ii
0153-find-minimum-in-rotated-sorted-array
0154-find-minimum-in-rotated-sorted-array-ii
0167-two-sum-ii-input-array-is-sorted
0217-contains-duplicate
0268-missing-number
0283-move-zeroes
0287-find-the-duplicate-number
0932-monotonic-array
0948-sort-an-array
1019-squares-of-a-sorted-array
1293-three-consecutive-odds
1476-count-negative-numbers-in-a-sorted-matrix
1574-maximum-product-of-two-elements-in-an-array
1584-average-salary-excluding-the-minimum-and-maximum-salary
1646-kth-missing-positive-number
1677-matrix-diagonal-sum
1791-richest-customer-wealth
1848-sum-of-unique-elements
2058-concatenation-of-array
2106-find-greatest-common-divisor-of-array
2231-find-first-palindromic-string-in-the-array
3324-split-the-array

Number Theory

2106-find-greatest-common-divisor-of-array
2491-smallest-even-multiple
3995-gcd-of-odd-and-even-sums

Two Pointers

0026-remove-duplicates-from-sorted-array
0027-remove-element
0028-find-the-index-of-the-first-occurrence-in-a-string
0075-sort-colors
0080-remove-duplicates-from-sorted-array-ii
0125-valid-palindrome
0151-reverse-words-in-a-string
0167-two-sum-ii-input-array-is-sorted
0283-move-zeroes
0287-find-the-duplicate-number
0344-reverse-string
0392-is-subsequence
1019-squares-of-a-sorted-array
2231-find-first-palindromic-string-in-the-array

String

0028-find-the-index-of-the-first-occurrence-in-a-string
0058-length-of-last-word
0125-valid-palindrome
0151-reverse-words-in-a-string
0242-valid-anagram
0344-reverse-string
0387-first-unique-character-in-a-string
0389-find-the-difference
0392-is-subsequence
0742-to-lower-case
2231-find-first-palindromic-string-in-the-array

Bit Manipulation

0268-missing-number
0287-find-the-duplicate-number
0371-sum-of-two-integers
0389-find-the-difference

Binary Search

0033-search-in-rotated-sorted-array
0035-search-insert-position
0074-search-a-2d-matrix
0081-search-in-rotated-sorted-array-ii
0153-find-minimum-in-rotated-sorted-array
0154-find-minimum-in-rotated-sorted-array-ii
0167-two-sum-ii-input-array-is-sorted
0268-missing-number
0287-find-the-duplicate-number
1476-count-negative-numbers-in-a-sorted-matrix
1646-kth-missing-positive-number

Simulation

2058-concatenation-of-array

Hash Table

0217-contains-duplicate
0242-valid-anagram
0268-missing-number
0387-first-unique-character-in-a-string
0389-find-the-difference
1848-sum-of-unique-elements
3324-split-the-array

Sorting

0075-sort-colors
0217-contains-duplicate
0242-valid-anagram
0268-missing-number
0389-find-the-difference
0948-sort-an-array
1019-squares-of-a-sorted-array
1574-maximum-product-of-two-elements-in-an-array
1584-average-salary-excluding-the-minimum-and-maximum-salary
3859-maximum-product-of-two-digits

Counting

0387-first-unique-character-in-a-string
1848-sum-of-unique-elements
3324-split-the-array

Divide and Conquer

0948-sort-an-array

Heap (Priority Queue)

0948-sort-an-array
1574-maximum-product-of-two-elements-in-an-array

Merge Sort

0948-sort-an-array

Bucket Sort

0948-sort-an-array

Radix Sort

0948-sort-an-array

Counting Sort

0948-sort-an-array

Queue

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

String Matching

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

Matrix

0074-search-a-2d-matrix
1476-count-negative-numbers-in-a-sorted-matrix
1677-matrix-diagonal-sum
1791-richest-customer-wealth

Dynamic Programming

0392-is-subsequence