Q1. You have to given an array A of size N. Find all the elements which appear more than floor(N/3) times in the given array. There is a condition that you have to do your job in O(N) time complexity and O(1) space complexity.

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Q2. Ramu has an array of strings. He want to find a string s such that it is a concatenation of sub-sequence of given array and have unique characters. A sub-sequence of an array is a set of elements that can be obtained by deleting zero or more el...

Q3. In a test Kartik gave students an array of n non-negative integers a1, a2, …, an ,where each represents a point at coordinate (i, ai). n vertical lines are drawn such that the two endpoints of line i is at (i, ai) and (i, 0). The task is to fin...

Q4. Krishna, a nature lover, loves to explore the winding forest trails in his town. However, he often loses his way and struggles to get back to the starting point. To overcome this problem, Krishna uses an array of positive and negative integers....

Q5. The heights of certain Buildings which lie adjacent to each other are given. Light starts falling from left side of the buildings. If there is a building of certain Height, all the buildings to the right side of it having lesser heights cannot ...

Q6. Alice has n candies, where the ith candy is of type candyType[i]. Alice noticed that she started to gain weight, so she visited a doctor.

Q7. A 'OverHappy' number follows the following criteria :

Q8. Given an array A, write a function to move all 0's to the end of it while maintaining the relative order of the non-zero elements.

Intuition Behind the Algorithm

The core idea behind this algorithm is the efficient reorganization of t...

Q9. Ram is very good at mathematics. He was given a number n and was told to find out number of trailing zeroes in n! in logarithmic time. Can you help him?

Intuition Behind the Algorithm

The problem presented to Ram involves finding the n...

Q10. Given an integer n, return an array containing n unique integers such that they add up to 0.

Intuition Behind the Algorithm

The core idea of the "Target Zero" problem is to generate a set of unique integers that sum up to zero. The ap...