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All Problems

# Status Problem video Level Completes Likes
56

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

Medium % 0
54

Find the maximum width of a binary tree

Medium % 0
53

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

Medium % 0
52

Find all common numbers in given three sorted arrays.

Beginner % 0
50

Find the first repeated element in an array by its index

Medium % 0
49

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

Beginner % 0
47

Find the Size of the Binary Tree

Beginner % 0
46

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

Medium % 0
44

Inorder Successor in Binary Tree

Medium % 0
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
31

Reverse a Linked List Using Recursion

Medium % 0
25

String Compression using count of repeated characters - Run Length Encoding

Beginner % 0
24

Replace Spaces with '%20' Without Using Default Functions

Medium % 0
16

Singly Linked List Implementation

Beginner % 0
14

Longest Shared Prefix Sequence in a String

Medium % 0
12

Efficient Methods to Find Pairs with Sum K in an Array

Beginner % 0
11

Check If String has All Unique Characters

Beginner % 0
10

Quick Sort Implementation

Medium % 0
8

Efficient Search in 2D Sorted Array: Find an Element

Medium % 0
7

Determine If a String is Palindrome

Beginner % 0
6

Find a peak element in a Given Array

Beginner % 0
3

Hash Table - Java

Beginner % 0

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

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.

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

Inorder Successor in Binary Tree

Adding Two Numbers with Linked Lists

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

Reverse a Linked List Using Recursion

String Compression using count of repeated characters - Run Length Encoding

Replace Spaces with '%20' Without Using Default Functions

Singly Linked List Implementation

Longest Shared Prefix Sequence in a String

Efficient Methods to Find Pairs with Sum K in an Array

Check If String has All Unique Characters

Quick Sort Implementation

Efficient Search in 2D Sorted Array: Find an Element

Determine If a String is Palindrome

Find a peak element in a Given Array

Hash Table - Java