LeetCode Topics

Array

0001-two-sum
0026-remove-duplicates-from-sorted-array
0027-remove-element
0035-search-insert-position
0056-merge-intervals
0121-best-time-to-buy-and-sell-stock
0217-contains-duplicate
0238-product-of-array-except-self
0792-binary-search
2163-kth-distinct-string-in-an-array
2350-find-closest-number-to-zero

Hash Table

0001-two-sum
0217-contains-duplicate
0242-valid-anagram
0383-ransom-note
0782-jewels-and-stones
1297-maximum-number-of-balloons
2163-kth-distinct-string-in-an-array

String

0020-valid-parentheses
0028-find-the-index-of-the-first-occurrence-in-a-string
0125-valid-palindrome
0242-valid-anagram
0344-reverse-string
0383-ransom-note
0392-is-subsequence
0782-jewels-and-stones
1297-maximum-number-of-balloons
1894-merge-strings-alternately
2163-kth-distinct-string-in-an-array

Counting

0383-ransom-note
1297-maximum-number-of-balloons
2163-kth-distinct-string-in-an-array

Two Pointers

0026-remove-duplicates-from-sorted-array
0027-remove-element
0028-find-the-index-of-the-first-occurrence-in-a-string
0125-valid-palindrome
0344-reverse-string
0392-is-subsequence
1894-merge-strings-alternately

Prefix Sum

0238-product-of-array-except-self

Dynamic Programming

0121-best-time-to-buy-and-sell-stock
0392-is-subsequence

Math

0009-palindrome-number

Stack

0020-valid-parentheses

String Matching

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

Binary Search

0035-search-insert-position
0792-binary-search

Sorting

0056-merge-intervals
0217-contains-duplicate
0242-valid-anagram