Given arrival and departure times of all trains that reach a railway station. Find the minimum number of platforms required for the railway station so that no train is kept waiting.
Consider that all the trains arrive on the same day and leave on th

There are two parallel roads, each containing N and M buckets, respectively. Each bucket may contain some balls. The balls in first road are given in an array a and balls in the second road in an array b. The buckets on both roads are kept in su

Mayank once came to New Delhi for an International Mathematics Conference. His mathematics skills were a great topic of discussion in those days. So a mathematician Harsh “Challenged” Mayank for a competition and Mayank accepted it.

Given a sorted array of N numbers, we need to maximize the sum of selected numbers. At each step, you need to select a number Ai, delete one occurrence of Ai-1 (if exists), and Ai each from the array. Repeat these steps until the array gets

Akku have solved many problems, she is genius. One day her friend gave her an Array and asked her to perform
some queries of following type:
Each query consists of three integers
1 A B : Update the Array at index A by value B
2 A B : if the subar

There are n houses and p water pipes in Geek Colony. Every house has at most one pipe going into it and at most one pipe going out of it. Geek needs to install pairs of tanks and taps in the colony according to the following guidelines.  
1. Ev

Given an array A of N integers and a 2D matrix denoting q queries. Each query consists of two elements, index and value. Update value at index in A for each query and then perform the following operations to get the result for that query.
1. Perform

A given series 3, 5, 9, 11, 15, 21, 29, ... and so on. You need to identify the pattern and determine whether the input number  ( n ) is a part of the given series or not. If yes then return "Yes", otherwise "No".

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