Problems

# Status Problem Level Completes Likes
71

Dijkstra Algorithm Implementation – TreeSet and Pair Class

Hard % 0
72

Check if Given Number is power of 2.

Beginner % 0
73

Rotate the given array in cycles

Beginner % 0
74

Heap Sort – Java Implementation

Medium % 0
75

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

Hard % 0
76

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

Medium % 0
77

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

Medium % 0
78

Fizz Buzz Challenge - Java Implementation

Beginner % 0
79

Graph – Detect Cycle in an Undirected Graph using DFS

Medium % 0
80

Graph – Detect Cycle in a Directed Graph

Medium % 0
81

Graph – Software Installation Problem

Medium % 0
82

Topological Sort

Medium % 0
83

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

Hard % 0
85

Remove Duplicates from a string

Medium % 0
86

Dynamic programming – Minimum Jumps to reach to end

Hard % 0
87

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

Beginner % 0
88

Majority Element- Boyer–Moore majority vote algorithm

Medium % 0
89

Check whether the given number is a perfect square

Beginner % 0
90

Find the Index from which 0 starts

Beginner % 0
91

Find the only element in array which appears only once

Beginner % 0
92

Algorithm to calculate power(k,n).

Beginner % 0
93

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

Medium % 0
94

Find two elements whose sum is closest to zero

Medium % 0
95

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

Medium % 0
96

Find the last non repeating character in a given string.

Beginner % 0
97

Find the last repeating character in a given string.

Beginner % 0
98

Find the first non repeating character in a given string

Beginner % 0
99

Find the first repeating character in a given string

Beginner % 0
101

Kadane's Algorithm - Maximum Subarray Problem

Medium % 0
102

Implement Stack Using Linked List

Beginner % 0
103

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

Medium % 0
104

Find the Kth Smallest/Largest Element in an Array

Beginner % 0
105

Dynamic Programming - Stairs Climbing Puzzle

Beginner % 0

Dijkstra Algorithm Implementation – TreeSet and Pair Class

Check if Given Number is power of 2.

Rotate the given array in cycles

Heap Sort – Java Implementation

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 – Java Program

Fizz Buzz Challenge - Java Implementation

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

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) extra 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