Replace Elements with Greatest Element on Right

Given an array of numbers nums[], write ment a function to replace each element of the array with the greatest element present to its right side. Replace the last element with -1.  Example: Input: [4, 5, 2, 25, 13, 16, 8] Output: [25, 25, 25, 16, 16, 8, -1] Input: [4, 5, 2, 25, 13, … Read more Replace Elements with Greatest Element on Right

Count similar words in a given array

Given an array of strings, write a program to count all the similar words.  Similar words: Two words are similar if Has spaces in-between or at the end. Ex: “Apple” and ” A pp le” are similar. Has upper or lower cases. Ex: “APPle” and “apple” are similar. Has special characters. Ex: “app%^L&e” and “@@apple” … Read more Count similar words in a given array

Sort 0’s, the 1’s and 2’s in the given array – Dutch National Flag algorithm | Set – 2

Given an array of numbers, that consists only of three types of integers, which are 0, 1, and 2. Write an algorithm to sort the given array. Example: Input: {2, 1, 2, 0, 1, 0} Output: {0, 0, 1, 1, 2, 2} Input: [0, 0, 2, 0, 2, 1, 0, 1, 2] Output: [0, 0, … Read more Sort 0’s, the 1’s and 2’s in the given array – Dutch National Flag algorithm | Set – 2

Override List Collections Sort Method

Many times we have a list of custom objects and we need to sort these objects. In such cases we need to override the compare function for Collections.sort method. In this article we discuss how to do that. Say we have a list of employees. Each employee has id, name, and salary. Write a function … Read more Override List Collections Sort Method

Calculate tax on income as per given tax brackets.

Given a list of tax brackets (different tax on different incomes). Write a program to calculate the tax on given income.  Tax bracket is a pair consisting of amount and percentage tax on that amount. If amount is null means, it’s a highest bracket and percentage tax is mentioned will be applied to all the … Read more Calculate tax on income as per given tax brackets.

The largest number can be formed from the given number

Given a number write an algorithm to construct the largest number possible by using the digits of given number. Given number could be a negative number as well.  Example: Given Input: 34277765 Output: 77765432 Given Input: -342765 Output: -234567 Given Input: 0 Output: 0 Given Input: 2034 Output: 4320 Approach: Sorting Check if the given … Read more The largest number can be formed from the given number

Check if the given playlist of programs is valid

Problem Statement: Given a playlist that contains the list of intervals with the start time, end time and program id. Write a program to validate whether the playlist is valid or not based on certain conditions.  The playlist will be considered invalid if any of the following is true – If any two programs overlap. … Read more Check if the given playlist of programs is valid

Unresolved references error – Django in PyCharm and IntelliJ

This is a known problem for many. If you are seeing “Unresolved references error” for all the imports of Django as in the image below (either in PyCharm or in IntelliJ) then the Django package is missing. Add Django Package in Intellij  Right click on your project and click on the open module setting. Select … Read more Unresolved references error – Django in PyCharm and IntelliJ