ankit92ios

//An exampple of Polymorphism in Swift

class A{
    func makeSound(){
        print("from A")
    }
}

class B : A{
    override func makeSound(){

ankit92ios

import Foundation
//Day 1: Interquartile Range



func medianFunc(numbers: [Int]) -> Double {
    let sortedNumbers = numbers.sorted(by: { num1, num2 in
        return num1 < num2 })
    
    let midIndex = numbers.count / 2

ankit92ios

import Foundation
//Day 1: Quartiles
func medianFunc(numbers: [Int]) -> Double {
    let sortedNumbers = numbers.sorted(by: { num1, num2 in
        return num1 < num2 })
    
    let midIndex = numbers.count / 2
    var median = Double(sortedNumbers[midIndex])
    if(numbers.count % 2 == 0){
        median = Double(sortedNumbers[midIndex] + sortedNumbers[midIndex - 1]) / Double(2)

ankit92ios

import Foundation
//Day 1: Standard Deviation

func StandardDeviation(numbers: [Int]) -> Double {
    var sum = 0.0
    for eachNo in numbers {
        sum += Double(eachNo)
    }
    let mean = sum / Double(numbers.count)
    var sumOfSquare : Double = 0

ankit92ios

import Foundation
//Day 0:weightMean
func weightMean(numbers: [Int] , weights : [Int]) -> Double {
    var sum = 0.0
    var totalWeights = 0
    for i in 0..<numbers.count {
        sum += Double(numbers[i] * weights[i])
        totalWeights += weights[i]
    }
    let weightMean = sum / Double(totalWeights)

ankit92ios

/*
10 Days of Statistics
Objective 
In this challenge, we practice calculating the mean, median, and mode. Check out the Tutorial tab for learning materials and an instructional video!

Task 
Given an array, , of  integers, calculate and print the respective mean, median, and mode on separate lines. If your array contains more than one modal value, choose the numerically smallest one.

Note: Other than the modal value (which will always be an integer), your answers should be in decimal form, rounded to a scale of  decimal place (i.e., ,  format).

ankit92ios

/*
 Diagonal Difference
 Given a square matrix, calculate the absolute difference between the sums of its diagonals.
 
 For example, the square matrix  is shown below:
 
 1 2 3
 4 5 6
 9 8 9
 The left-to-right diagonal = . The right to left diagonal = . Their absolute difference is .

ankit92ios

/*
 Compare the Triplets
 Alice and Bob each created one problem for HackerRank. A reviewer rates the two challenges, awarding points on a scale from  to  for three categories: problem clarity, originality, and difficulty.
 
 We define the rating for Alice's challenge to be the triplet , and the rating for Bob's challenge to be the triplet .
 
 Your task is to find their comparison points by comparing  with ,  with , and  with .
 
 If , then Alice is awarded  point.
 If , then Bob is awarded  point.

ankit92ios

/*
 Cats and a Mouse
 Two cats and a mouse are at various positions on a line. You will be given their starting positions. Your task is to determine which cat will reach the mouse first, assuming the mouse doesn't move and the cats travel at equal speed. If the cats arrive at the same time, the mouse will be allowed to move and it will escape while they fight.
 
 You are given  queries in the form of , , and  representing the respective positions for cats  and , and for mouse . Complete the function  to return the appropriate answer to each query, which will be printed on a new line.
 
 If cat  catches the mouse first, print Cat A.
 If cat  catches the mouse first, print Cat B.
 If both cats reach the mouse at the same time, print Mouse C as the two cats fight and mouse escapes.
 For example, cat  is at position  and cat  is at . If mouse  is at position , it is  units from cat  and  unit from cat . Cat  will catch the mouse.

ankit92ios

//Electronics Shop
//Problem
/*
 Monica wants to buy a keyboard and a USB drive from her favorite electronics store. The store has several models of each. Monica wants to spend as much as possible for the  items, given her budget.
 
 Given the price lists for the store's keyboards and USB drives, and Monica's budget, find and print the amount of money Monica will spend. If she doesn't have enough money to both a keyboard and a USB drive, print -1 instead. She will buy only the two required items.
 
 For example, suppose she has  to spend. Three types of keyboards cost . Two USB drives cost . She could purchase a , or a . She chooses the latter. She can't buy more than  items so she can't spend exactly .
 
 Function Description