Category: Arrays

5

Rearrange Positive and Negative Numbers of Array On Each Side in O(nlogn)

Objective: Rearrange Positive and Negative Numbers of an Array so that one side you have positive numbers and other side with negative Integers without changing their respective order. Example : Input :  1 -2...

3

Find The Longest Sequence Of Prefix Shared By All The Words In A String

Objective: Write an algorithm to find The Longest Sequence Of Prefix Shared By All The Words In A String. This interesting problem was asked in the Google interview for software engineer. This problem is...

3

Print All Elements of Two Dimensional Array in Spiral

Objective: This question was asked in Amazon interview for the Software development Engineer position, Write an algorithm to print all the elements of two dimensional array in spiral. Example : Input: Two dimensional array...

1

Find a pair of numbers from an array whose sum equals k

Objective: Write an algorithm to find out whether in a given array there exists or not two numbers whose sum is exactly equals to a given number. This problem has been asked in Amazon...

0

Find an Element in 2 dimensional sorted array

Objective : Write an algorithm to find an Element in 2 dimensional array where rows and columns are sorted respectively. Input: A two dimensional sorted array, arrA[][].   Output : True or false based...

3

Find Whether Given String is palindrome or Not.

Objective : Write an algorithm to find Whether Given String is palindrome or Not. Input:  A String, Output: true or false on whether string is palindrome or not Approach: Use recursive approach Compare first...

2

Find a peak element in a Given Array

Objective : In this article we will discuss an algorithm to Find a peak element in a Given Array. We will see the recursion techniques to solve this problem. Peak Element: peak element is...

1

Find two Missing Numbers in a Sequence of Consecutive Numbers

Objective : Write an algorithm to find two Missing Numbers in a Sequence of Consecutive Numbers Input:  Array, arrA[] with two missing numbers and Range Output : Two missing numbers Approach: Approach is very...

0

Find a Missing Number From a Sequence of Consecutive Numbers

Objective : You have been asked to Write an algorithm Find a Missing Number From a Sequence of Consecutive Numbers Input:  Array, arrA[] with a missing number and Range Output : missing number Approach: Approach...

0

Merge Sort – Updated – Most Efficient ways to Implement

Objective : Write Merge Sort algorithm to sort elements in an array Input: A unsorted array, arrA[]. Output : A sorted array. Approach: Divide and Conquer: In this approach we divide the main problems...

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