Practice_question.txt

Must do coding question
Easy :
1 Two Sum
7 Reverse Integer
8 Palindrome number
20 Valid Paranthesis
21 Merge two sorted list
26 Remove duplicates from sorted array
27 Remove element
53 Maximum Subarray
67 Add binary
111 Minimum depth of binary tree
112 Path sum
118 Pascal's triangle
121 Best time to buy and sell stocks
172 Factorial Trailing zeros
189 Rotate Array
236 LCA of a binary tree
237 Delete node in a LL
242 Valid Anagram
268 Missing number
605 Can place flowers
994 Rotting oranges

Medium:
3 Longest substring without repeating characters
5 LPS
6 ZigZag
11 Container with most water
15 3 sum
17 Letter Combinations of a Phone Number
19 Remove Nth Node From End of List
54 Spiral Matrix
55 Jump game
75 Sort colors
98 Valid BST
105 Construct Binary Tree from Preorder and Inorder Traversal
106 Construct Binary Tree from Inorder and Postorder Traversal
109 Convert Sorted List to Binary Search Tree
129 Sum to root numbers
213 House robber 2
215 Kth largest element in an array
225 Implement stack using queues
238 Product of an array except self
300 LIS

Hard:
23 Merge k sorted list
25 Reverse nodes in k-group
32 Longest valide parentheses
42 Trapping Rain water
72 Edit distance
84 Largest rectangle in histogram
135 Candy
239 Sliding window maximum
403 Frog Jump
1001 Grid illumination