LeetCode Topics

Array

0001-two-sum
0026-remove-duplicates-from-sorted-array
0027-remove-element
0035-search-insert-position
0066-plus-one
0088-merge-sorted-array
0121-best-time-to-buy-and-sell-stock
0136-single-number
0169-majority-element
0217-contains-duplicate
0268-missing-number
0283-move-zeroes
0349-intersection-of-two-arrays
0414-third-maximum-number
0448-find-all-numbers-disappeared-in-an-array
0455-assign-cookies

Hash Table

0001-two-sum
0169-majority-element
0217-contains-duplicate
0242-valid-anagram
0268-missing-number
0349-intersection-of-two-arrays
0389-find-the-difference
0448-find-all-numbers-disappeared-in-an-array

Sorting

0088-merge-sorted-array
0169-majority-element
0217-contains-duplicate
0242-valid-anagram
0268-missing-number
0349-intersection-of-two-arrays
0389-find-the-difference
0414-third-maximum-number
0455-assign-cookies

Math

0009-palindrome-number
0066-plus-one
0268-missing-number
0326-power-of-three
0412-fizz-buzz
1013-fibonacci-number

String

0020-valid-parentheses
0028-find-the-index-of-the-first-occurrence-in-a-string
0125-valid-palindrome
0242-valid-anagram
0344-reverse-string
0389-find-the-difference
0412-fizz-buzz

Simulation

0412-fizz-buzz

Two Pointers

0026-remove-duplicates-from-sorted-array
0027-remove-element
0028-find-the-index-of-the-first-occurrence-in-a-string
0088-merge-sorted-array
0125-valid-palindrome
0283-move-zeroes
0344-reverse-string
0349-intersection-of-two-arrays
0455-assign-cookies

Dynamic Programming

0121-best-time-to-buy-and-sell-stock
1013-fibonacci-number

Recursion

0326-power-of-three
1013-fibonacci-number

Memoization

1013-fibonacci-number

Binary Search

0035-search-insert-position
0268-missing-number
0349-intersection-of-two-arrays

Bit Manipulation

0136-single-number
0268-missing-number
0389-find-the-difference

Divide and Conquer

0169-majority-element

Counting

0169-majority-element

Greedy

0455-assign-cookies

String Matching

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

Stack

0020-valid-parentheses