Recent questions and answers in Algorithm Challenges / GATE Overflow for GATE CSE

0 votes

0 answers

1

Make Equal Subarray Problem Statement You are given two arrays (A and B) each of size N. You want to change A to B.

Make Equal SubarrayProblem StatementYou are given two arrays (A and B) each of size N.You want to change A to B. Changing the i-th element of A to i-th element of B costs...

rk231219

1.6k views

rk231219 asked Jan 5, 2022

1 votes

4 answers

2

Maximum length substring with k unique characters
Given an input string of length $n$, find the maximum length of the substring containing maximum $k$ unique characters. For example, for "abbcdaadcd" and $k=2$ answer will be 4 for the substring "daad".

Given an input string of length $n$, find the maximum length of the substring containing maximum $k$ unique characters. For example, for "abbcdaadcd" and $k=2$ answer wil...

Debargha Bhattacharj

2.0k views

Debargha Bhattacharj answered Feb 18, 2019

1 votes

1 answer

3

Finding best time complexity
$\begin{align*} & a[n] = \{x_1,x_2,x_3,x_4,....,x_n\} \text{ is an array of integers where } n,x_i > 0. \\ & A = \left [ \text{min}\left ( x_i,x_j \right ) \right ] \cdot \left ( j-i \right ) \text{ where } j > i \text{ and } i,j \leq n \\ & \text{What is the best time complexity to find out the value of } A_{\bf max} \; ? \end{align*}$

$\begin{align*} & a[n] = \{x_1,x_2,x_3,x_4,....,x_n\} \text{ is an array of integers where } n,x_i 0. \\ & A = \left [ \text{min}\left ( x_i,x_j \right ) \right ] \cdot ...

dd

1.1k views

dd answered May 27, 2017

2 votes

2 answers

4

Maximum Continuous Sum in an Array
Given an array of $n$ elements find the maximum continuous sum in it. For example consider the below array of $n=6$. 23 4 -10 2 15 1 Answer is 35.

Given an array of $n$ elements find the maximum continuous sum in it. For example consider the below array of $n=6$.23 4 -10 2 15 1Answer is 35.

amuchand47

3.1k views

amuchand47 answered Feb 14, 2017

3 votes

2 answers

5

Amazon Interview question on Linked list
Given a linked list : 1->2->3->4->5->6, make the following changes 1->6->2->5->3->4 What would be the most effiicient way to make this change?

Given a linked list :1->2->3->4->5->6,make the following changes1->6->2->5->3->4What would be the most effiicient way to make this change?

Ahwan

2.4k views

Ahwan answered Oct 2, 2016

0 votes

2 answers

6

Multiplication without '*'
Write a function (proper programming code) for multiplying two integers without using '*' operator and considering all corner cases.

Write a function (proper programming code) for multiplying two integers without using '*' operator and considering all corner cases.

ManojK

1.3k views

ManojK answered Jun 6, 2016

1 votes

0 answers

7

Equivalence of Boolean Expressions
Write an object oriented code for representing boolean expressions and then a function for checking the equivalence of two boolean expressions.

Write an object oriented code for representing boolean expressions and then a function for checking the equivalence of two boolean expressions.

Arjun

457 views

Arjun asked Jun 6, 2016

0 votes

0 answers

8

Evaluate an arithmetic expression
Given an arithmetic expression involving *, + only write an object oriented code for its representation and evaluation

Given an arithmetic expression involving *, + only write an object oriented code for its representation and evaluation

Arjun

1.1k views

Arjun asked Jun 6, 2016

2 votes

1 answer

9

Zigzag Arrangement
Given an array with possible repeating elements you have to rearrange such that elements are alternatively decreasing and increasing (strict increase/decrease). For example, suppose the given array is 1 1 2 3 4 5 one possible answer would be 2 1 3 1 5 4. Assumption: Solution do exist for any given input. Hint: Try to avoid sorting.

Given an array with possible repeating elements you have to rearrange such that elements are alternatively decreasing and increasing (strict increase/decrease). For examp...

Arjun

1.7k views

Arjun answered May 30, 2016

3 votes

1 answer

10

Permutation of String
How to generate permutation of a string? What will be the complexity?

How to generate permutation of a string? What will be the complexity?

Arjun

1.0k views

Arjun answered May 30, 2016

2 votes

1 answer

11

Open the lock
You are given a number lock of 4 digits and it accepts a serial input. What should be the minimum length of an input string so that the lock is guaranteed to open assuming it opens if any of the consecutive 4 digits matches the code. Also how to get one such sequence?

You are given a number lock of 4 digits and it accepts a serial input. What should be the minimum length of an input string so that the lock is guaranteed to open assumin...

Shashank Kumar

1.4k views

Shashank Kumar answered Apr 29, 2016

1 votes

1 answer

12

what is the best time complexity to find maximum product of exactly k elements in an array ?
According to me first we sort the array in O(nlogn) time and then in O(k) time , find the product , so total time complexity is O(nlogn) , so am I right or can it be done in lesser time ?

According to me first we sort the array in O(nlogn) time and then in O(k) time , find the product , so total time complexity is O(nlogn) , so am I right or can it be done...

Riya Roy(Arayana)

2.2k views

Riya Roy(Arayana) answered Apr 10, 2016

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