Algo

Articles

Difficulty:

Easy, Medium, Hard :

ARRAYS AND HASHING (8 Problems)

• 217. Contains Duplicate
• 242. Valid Anagram
• 1. Two Sum
• 49. Group Anagrams
• 347. Top K Frequent Elements
• 238. Product of Array Except Self
• 36. Valid Sudoku
• 128. Longest Consecutive Sequence

TWO POINTERS (5 Problems)

• 125. Valid palindrome
• 167. Two Sum II - Input Array is Sorted
• 15. 3Sum ****