# Status Problem video Level Completes Likes
334

Dijkstra Algorithm Implementation – TreeSet

Hard % 0
330

Check if Given Number is power of 2

Beginner % 1
329

Rotate the given array in cycles

Beginner % 0
328

Heap Sort

Medium % 0
325

Find no of reverse pairs in an array which is sorted in two parts in O(N)

Medium % 1
319

Get the Sum of Digits in a number till it become a single digit

Medium % 0
317

Check if given number is Prime - O(√N) Solution

Medium % 0
302

Fizz Buzz Challenge

Beginner % 0
274

Graph – Detect Cycle in an Undirected Graph using DFS

Medium % 0
273

Graph – Detect Cycle in a Directed Graph

Medium % 1
272

Graph – Software Installation Problem

Medium % 0
268

Topological Sort

Medium % 1
261

Sliding Window Algorithm (Track the maximum of each subarray of size k)

Hard % 0
248

Remove Duplicates from a string | 4 Approaches

Medium % 0
246

Dynamic programming – Minimum Jumps to reach to end

Hard % 0
236

Find three elements in an array that sum to a given value

Beginner % 1
235

Majority Element- Boyer–Moore majority vote algorithm

Medium % 0
232

Check whether the given number is a perfect square

Beginner % 0
230

Find the Index from which 0 starts

Beginner % 0
228

Find the only element in array which appears only once

Beginner % 1
227

Algorithm to calculate power(k,n).

Beginner % 1
219

Find the two repeating elements in a given array | 6 Approaches

Medium % 1
217

Find two elements whose sum is closest to zero

Medium % 1
215

Find duplicates in an given array in O(n) time and O(1) space

Medium % 0
214

Find the last non repeating character in a given string.

Beginner % 0
213

Find the last repeating character in a given string

Beginner % 0
212

Find the first non repeating character in a given string

Beginner % 0
211

Find the first repeating character in a given string

Beginner % 0
198

Kadane's Algorithm - Maximum Subarray Problem

Medium % 1
193

Implement Stack Using Linked List

Beginner % 0
186

Reverse a Linked List in groups of given size 'K'

Medium % 0
155

Find the Kth Smallest/Largest Element in an Array

Beginner % 0
146

Dynamic Programming - Stairs Climbing Puzzle

Beginner % 1

Dijkstra Algorithm Implementation – TreeSet

Check if Given Number is power of 2

Rotate the given array in cycles

Heap Sort

Find no of reverse pairs in an array which is sorted in two parts in O(N)

Get the Sum of Digits in a number till it become a single digit

Check if given number is Prime - O(√N) Solution

Fizz Buzz Challenge

Graph – Detect Cycle in an Undirected Graph using DFS

Graph – Detect Cycle in a Directed Graph

Graph – Software Installation Problem

Topological Sort

Sliding Window Algorithm (Track the maximum of each subarray of size k)

Remove Duplicates from a string | 4 Approaches

Dynamic programming – Minimum Jumps to reach to end

Find three elements in an array that sum to a given value

Majority Element- Boyer–Moore majority vote algorithm

Check whether the given number is a perfect square

Find the Index from which 0 starts

Find the only element in array which appears only once

Algorithm to calculate power(k,n).

Find the two repeating elements in a given array | 6 Approaches

Find two elements whose sum is closest to zero

Find duplicates in an given array in O(n) time and O(1) space

Find the last non repeating character in a given string.

Find the last repeating character in a given string

Find the first non repeating character in a given string

Find the first repeating character in a given string

Kadane's Algorithm - Maximum Subarray Problem

Implement Stack Using Linked List

Reverse a Linked List in groups of given size 'K'

Find the Kth Smallest/Largest Element in an Array

Dynamic Programming - Stairs Climbing Puzzle