Top Interview 150

88. Merge Sorted Array

Array Two Pointers Sorting Easy

27. Remove Element

Array Two Pointers Easy

26. Remove Duplicates from Sorted Array

Array Two Pointers Easy

80. Remove Duplicates from Sorted Array II

Array Two Pointers Medium

169. Majority Element

Array Hash Table Divide and Conquer Sorting Counting Easy

189. Rotate Array

Array Math Two Pointers Medium

121. Best Time to Buy and Sell Stock

Array Dynamic Programming Easy

122. Best Time to Buy and Sell Stock II

Array Dynamic Programming Greedy Medium

55. Jump Game

Array Dynamic Programming Greedy Medium

238. Product of Array Except Self

Array Prefix Sum Medium

151. Reverse Words in a String

Two Pointers String Medium

6. Zigzag Conversion

String Medium

28. Find the Index of the First Occurrence in a String

Two Pointers String String Matching Easy

125. Valid Palindrome

Two Pointers String Easy

392. Is Subsequence

Two Pointers String Dynamic Programming Easy

11. Container With Most Water

Array Two Pointers Greedy Medium

3. Longest Substring Without Repeating Characters

Hash Table String Sliding Window Medium

383. Ransom Note

Hash Table String Counting Easy

1. Two Sum

Array Hash Table Easy

20. Valid Parentheses

String Stack Easy

17. Letter Combinations of a Phone Number

Hash Table String Backtracking Medium

66. Plus One

Array Math Easy

70. Climbing Stairs

Math Dynamic Programming Memoization Easy

139. Word Break

Array Hash Table String Dynamic Programming Trie Memoization Medium

5. Longest Palindromic Substring

Two Pointers String Dynamic Programming Medium