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Two Dimensional Segment Tree | Sub-Matrix Sum
Given a rectangular matrix M[0…n-1][0…m-1], and queries are asked to find the sum / minimum / maximum on some sub-rectangles M[a…b][e…f], as well as queries… Read More »
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Multistage Graph (Shortest Path)
A Multistage graph is a directed graph in which the nodes can be divided into a set of stages such that all edges are from… Read More »
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Sort an array which contain 1 to n values
You have given an array which contain 1 to n element, your task is to sort this array in an efficient way and without replace… Read More »
GoIbibo interview experience | Set 2 (On-Campus)
Like every year, Goibibo visited our campus this year also. The interview process has 1 written test and 3 technical followed by 1 HR interview.… Read More »
C program for pipe in Linux
Working and implementation of Pipe in Linux. Prerequisite : Pipe in Linux Approach : Pipe is highly used in Linux. Basically, pipe has 2 parts,… Read More »
Hill Cipher
Hill cipher is a polygraphic substitution cipher based on linear algebra.Each letter is represented by a number modulo 26. Often the simple scheme A =… Read More »
Private Methods in Java 9 Interfaces
Java 9 onwards, you can include private methods in interfaces. Before Java 9 it was not possible. Interfaces till Java 7 In Java SE 7… Read More »
vector : : resize() in C++ STL
Vectors are known as dynamic arrays which can change its size automatically when an element is inserted or deleted. This storage is maintained by container.… Read More »
Orange Business Services Interview Experience
Round 1: Online Test – Codility Round Test Duration : 90 mins The first round comprised of around 30 questions mostly on Java in which… Read More »
Sorting array using Stacks
Given an array of elements, task is to sort these elements using stack. Prerequisites : Stacks Examples : Input : 8 5 7 1 9… Read More »
Google Summer Trainee Engineering Program(STEP) Interview Experience
Telephonic Interview 1. (Telephonic + Google Docs Shared) Q1. Given an array of integers, you need to find the local maxima. Example : [1 3… Read More »
PHP | print_r() Function
The print_r() function is a built-in function in PHP and is used to print or display information stored in a variable. Syntax: print_r( $variable, $isStore… Read More »
PHP | disk_total_space( ) Function
The disk_total_space() function in PHP is an inbuilt function which is used to return the total space of a specified directory. The disk_total_space() function denotes… Read More »
Find maximum element of each row in a matrix
Given a matrix, the task is to find the maximum element of each row. Examples : Input : [1, 2, 3] [1, 4, 9] [76,… Read More »
PHP programs for printing pyramid patterns
This article is aimed at giving a PHP implementation for pattern printing. Simple Pyramid Pattern Output : * * * * * * * *… Read More »
Java Integer compare() method
The compare() method of Integer class of java.lang package compares two integer values (x, y) given as a parameter and returns the value zero if… Read More »
PHP | cal_days_in_month( ) Function
The cal_days_in_month( ) function in PHP is an inbuilt function which is used to return the number of days in a month for a specific… Read More »