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	Top 20 Problems on Dynamic programming		Top 10 Problems on Backtracking
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All Problems

#	Status	Problem	Level	Completes	Likes
491		Print Left View of a given binary tree	Medium	%	0
492		Print Right View of a given binary tree	Medium	%	0
493		In a Binary Tree, Check if Two nodes has the same parent or are siblings	Medium	%	0
494		In a Binary Tree, Check if two nodes are Cousins	Medium	%	0
495		Check if Two BST's are Identical	Beginner	%	0
496		Print Paths from root to all leaf nodes in a binary tree.	Medium	%	0
497		Print All The Permutations Of a String	Hard	%	0
498		Sort an Given Array in the order defined by another array	Medium	%	0
499		Sort an Array - odd numbers appear first in ascending order followed by the even numbers in descending order.	Medium	%	0
500		Print All Nodes Between Two Given Levels	Medium	%	0
501		Find the maximum width of a binary tree	Medium	%	0
502		Find the number of occurrences of a number in a given sorted array.	Medium	%	0
503		Find all common numbers in given three sorted arrays.	Beginner	%	0
504		Level Order Traversal in Zig Zag pattern OR Print in Spiral Pattern	Hard	%	0
505		Find the first repeated element in an array by its index	Medium	%	0
506		Minimum number that cannot be formed by any subset of an array	Beginner	%	0
507		Find the Size of the Binary Tree	Beginner	%	0
508		Given two binary trees, check if one binary tree is a subtree of another	Medium	%	0
509		Print a path from Root to Node in Binary Tree	Medium	%	0
510		Inorder Successor in Binary Tree	Medium	%	0
511		Inorder Successor in Binary Search Tree without Using Parent link	Hard	%	0
512		Inorder Successor in Binary Search Tree Using Parent link	Hard	%	0
513		In a Binary Tree, Create Linked Lists of all the nodes at each depth.	Hard	%	0
514		Level Order Traversal, Print each level in separate line.	Medium	%	0
515		Find whether a Given Binary Tree is Balanced?	Medium	%	0
516		Get the Height of a Node in a Binary Tree	Medium	%	0
517		Add two numbers represented by a linked list, Numbers are Stored in FORWARD order	Medium	%	0
518		Add two numbers represented by a linked list, Numbers are Stored in REVERSE order	Medium	%	0
519		Binary Search Tree (BST) Complete Implementation.	Beginner	%	0
520		Reverse a Linked List - Part 2	Medium	%	0
521		Swap Every Kth Node in a LinkedList	Medium	%	0
522		Delete a Node in the Middle of a linked list, Given only access to that Node	Beginner	%	0
523		Find the n'th Node from the end of a given Linked List	Beginner	%	0
524		Remove Duplicates from an Unsorted Linked list	Beginner	%	0
525		String Compression using count of repeated characters - Run Length Encoding	Beginner	%	0

Print Left View of a given binary tree

Print Right View of a given binary tree

In a Binary Tree, Check if Two nodes has the same parent or are siblings

In a Binary Tree, Check if two nodes are Cousins

Check if Two BST's are Identical

Print Paths from root to all leaf nodes in a binary tree.

Print All The Permutations Of a String

Sort an Given Array in the order defined by another array

Sort an Array - odd numbers appear first in ascending order followed by the even numbers in descending order.

Print All Nodes Between Two Given Levels

Find the maximum width of a binary tree

Find the number of occurrences of a number in a given sorted array.

Find all common numbers in given three sorted arrays.

Level Order Traversal in Zig Zag pattern OR Print in Spiral Pattern

Find the first repeated element in an array by its index

Minimum number that cannot be formed by any subset of an array

Find the Size of the Binary Tree

Given two binary trees, check if one binary tree is a subtree of another

Print a path from Root to Node in Binary Tree

Inorder Successor in Binary Tree

Inorder Successor in Binary Search Tree without Using Parent link

Inorder Successor in Binary Search Tree Using Parent link

In a Binary Tree, Create Linked Lists of all the nodes at each depth.

Level Order Traversal, Print each level in separate line.

Find whether a Given Binary Tree is Balanced?

Get the Height of a Node in a Binary Tree

Add two numbers represented by a linked list, Numbers are Stored in FORWARD order

Add two numbers represented by a linked list, Numbers are Stored in REVERSE order

Binary Search Tree (BST) Complete Implementation.

Reverse a Linked List - Part 2

Swap Every Kth Node in a LinkedList

Delete a Node in the Middle of a linked list, Given only access to that Node

Find the n'th Node from the end of a given Linked List

Remove Duplicates from an Unsorted Linked list

String Compression using count of repeated characters - Run Length Encoding

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