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Top 20 Problems on Dynamic programming

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Top 25 Problems on Trees

Top 10 Problems on Bits Manipulation

Top 15 Problems in LinkedList

All Problems

# Status Problem video Level Completes Likes
58

Generate All String Permutations

Hard % 0
57

Sort an Array According to the Order Defined by Another Array

Medium % 0
56

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

Medium % 0
54

Maximum Width of a Binary Tree

Medium % 0
53

Count occurrences of a number in a sorted array

Medium % 0
52

Find Common Numbers in Three Sorted Arrays

Beginner % 0
50

Find the first repeated element in an array by its index

Medium % 0
49

Find the Unreachable Minimum in Array Subsets

Medium % 0
48

Determining Whether a Given Binary Tree is a Binary Search Tree (BST)

Medium % 1
47

Find the Size of the Binary Tree

Beginner % 0
46

Check if One Binary Tree is a Subtree of Another

Medium % 0
44

Inorder Successor in Binary Tree

Medium % 0
41

Sorted Array to Binary Search Tree of Minimal Height

Medium % 1
40

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

Hard % 0
39

Level Order Traversal, Print each level in separate line

Medium % 0
38

Determining Binary Tree Balance

Medium % 0
37

Get the Height of a Node in a Binary Tree

Medium % 0
36

Find the Maximum Depth OR Height of a Binary Tree

Beginner % 1
35

Adding Two Numbers with Linked Lists

Medium % 0
34

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

Medium % 0
33

Reverse the binary representation of a number.

Medium % 1
32

Binary Search Tree (BST) Complete Implementation.

Beginner % 0
31

Reverse a Linked List Using Recursion

Medium % 0
30

Swap Every Kth Node in a LinkedList

Medium % 0
29

Delete a Node in the Middle of a Linked List Without Access to Head Node

Beginner % 0
28

Determine the Nth Node from the Tail in a Linked List

Beginner % 0
27

Remove Duplicates from an Unsorted Linked list

Beginner % 0
26

Check if one string is Rotation of another string

Beginner % 1
25

String Compression using count of repeated characters - Run Length Encoding

Beginner % 0
24

Replace Spaces with '%20' Without Using Default Functions

Medium % 0

Generate All String Permutations

Sort an Array According to the Order Defined by Another Array

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

Maximum Width of a Binary Tree

Count occurrences of a number in a sorted array

Find Common Numbers in Three Sorted Arrays

Find the first repeated element in an array by its index

Find the Unreachable Minimum in Array Subsets

Determining Whether a Given Binary Tree is a Binary Search Tree (BST)

Find the Size of the Binary Tree

Check if One Binary Tree is a Subtree of Another

Inorder Successor in Binary Tree

Sorted Array to Binary Search Tree of Minimal Height

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

Level Order Traversal, Print each level in separate line

Determining Binary Tree Balance

Get the Height of a Node in a Binary Tree

Find the Maximum Depth OR Height of a Binary Tree

Adding Two Numbers with Linked Lists

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

Reverse the binary representation of a number.

Binary Search Tree (BST) Complete Implementation.

Reverse a Linked List Using Recursion

Swap Every Kth Node in a LinkedList

Delete a Node in the Middle of a Linked List Without Access to Head Node

Determine the Nth Node from the Tail in a Linked List

Remove Duplicates from an Unsorted Linked list

Check if one string is Rotation of another string

String Compression using count of repeated characters - Run Length Encoding

Replace Spaces with '%20' Without Using Default Functions