LeetCode Solutions (Nitesh Mishra):

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• EASY Category (13 Problems):
  • 1 ----> Two Sum
  • 7 ----> Reverse Integer
  • 9 ----> Palindrome Number
  • 14 ---> Longest Common Prefix
  • 20 ---> Valid Parentheses
  • 21 ---> Merge Two Sorted Lists
  • 26 ---> Remove Duplicates from Sorted Array
  • 27 ---> Remove Element
  • 28 ---> Implement strStr()
  • 88 ---> Merge Sorted Array
  • 141 --> Linked List Cycle
  • 242 --> Valid Anagram
  • 283 --> Move Zeroes

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• MEDIUM Category (15 Problems):
  • 2 ----> Add Two Numbers
  • 3 ----> Longest Substring Without Repeating Characters
  • 5 ----> Longest Palindromic Substring
  • 15 ---> Three Sum
  • 34 ---> Find First and Last Position of Element in Sorted Array
  • 49 ---> Group Anagrams
  • 50 ---> Pow(x, n)
  • 54 ---> Spiral Matrix
  • 74 ---> Search a 2D Matrix
  • 138 --> Copy List with Random Pointer
  • 199 --> Binary Tree Right Side View
  • 200 --> Number of Islands
  • 238 --> Product of Array Except Self
  • 240 --> Search a 2D Matrix II
  • 445 --> Add Two Numbers II

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• HARD Category (5 Problems):
  • 4 ----> Median of Two Sorted Arrays
  • 23 ---> Merge k Sorted Lists
  • 25 ---> Reverse Nodes in k-Group
  • 42 ---> Trapping Rain Water
  • 146 --> LRU Cache

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