Array:
1.Binary Search
2.Find Maximum in Sliding Window —> LC 239
3.Search rotated array —> LC 33
4.Find smallest common number —> 404
5.Rotate Array —> LC 189
6.Find low/high index —> 404
7.Move zeros to left —> LC 283
8.Find maximum single sell profit —> LC 121
9.Implement Quicksort —> 404
10.Merge Overlapping Intervals —> LC 56
11.Sum of Two Values —> LC 1
Linked List:
1.Reverse a singly linked list —> LC 206
2.Remove Duplicates from a Linked List —> 83
3.Insertion Sort of a Linked List —> LC147
4.Intersection Point of Two Lists —> LC 160
5.Nth from last node —> LC 19
6.Swap Nth Node with Head —> 404
7.Merge Two Sorted Linked Lists —> LC21
8.Merge Sort —> LC 148
9.Reverse even nodes —> LC 328
10.Rotate a Linked list —> LC 61
11.Reverse k Elements —> LC 25
12.Add Two Integers —> LC 2
13.Copy linked list with arbitrary pointer —> LC 138
Math & Stats
1.Find kth permutation —> LC 60
String
1.Reverse words in a sentence —> LC 151
2.Remove white spaces —> LC316
3.Remove white spaces —> 404
4.String Segmentation —> LC 139
5.XML to Tree —> 404
6.Find all palindrome substrings —> LC 647
7.Regular Expression —> LC 10
Tree
1. Check if two binary trees are identical --> LC 100
2. Write an In-Order Iterator for a Binary Tree --> LC 94
3. Iterative Inorder Traversal --> LC 94 with out recursive
4. Inorder Successor BST --> LC 285
5. Level Order Traversal of Binary Tree -->LC 102
6. Is Binary Search Tree --> LC 94
7. Convert Binary Tree To Doubly Linked List —> 404 ***
8. Print Tree Perimeter —> LC 545 & LintCode 878
9. Connect Same Level Siblings —> LC 116
10. Serialize/Deserialize Binary Tree —> LC 297
11. Inorder Successor BST with parent pointers —> 404
12. Nth Highest in BST —> Similar LC 230
13. Mirror binary tree nodes —> LC 226
14. Delete zero sum sub-trees —> 404
15. N-ary Tree to Binary Tree —> LC 431
Stacks and Queues
1. Stack using Queues —> LC 225
2. Queue using Stacks --> LLC 232
3. Expression Evaluation --> LC 150
Graphic
1. Clone a Directed Graph --> LC 113
2. Minimum Spanning Tree --> 404
3. Word Chaining --> 404