# Status Problem video Level Completes Likes
338

Find Number of reverse pairs in an array

Hard % 1
337

Find first two largest elements in a given array

Beginner % 0
336

Calculate Logn base r – Java Implementation

Beginner % 0
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
305

Find number of Distinct Permutations of a String

Medium % 0
302

Fizz Buzz Challenge

Beginner % 0
273

Graph – Detect Cycle in a Directed Graph

Medium % 1
272

Graph – Software Installation Problem

Medium % 0
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
242

Find the Bit Flips Needed: Convert One Binary Number to Another

Beginner % 1
238

Separate 0’s and 1’s in a given array

Beginner % 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
234

Majority Element – Part 1

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
222

Maximum Subarray OR Largest Sum Contiguous Subarray Problem – Divide and Conquer

Hard % 0
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

Find Number of reverse pairs in an array

Find first two largest elements in a given array

Calculate Logn base r – Java Implementation

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

Find number of Distinct Permutations of a String

Fizz Buzz Challenge

Graph – Detect Cycle in a Directed Graph

Graph – Software Installation Problem

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 the Bit Flips Needed: Convert One Binary Number to Another

Separate 0’s and 1’s in a given array

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

Majority Element- Boyer–Moore majority vote algorithm

Majority Element – Part 1

Find the Index from which 0 starts

Find the only element in array which appears only once

Algorithm to calculate power(k,n).

Maximum Subarray OR Largest Sum Contiguous Subarray Problem – Divide and Conquer

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