Hackerrank - Library Fine - Pavol Pidanič

Problem Statement
A description of the problem can be found on Hackerrank.

Solution
Read 2 lines and parse dates.
Substract actual year, month, day and expected year, month and day.
Compare values and calculate fee:
– if year difference is greater than 0 theb return 10000
– if year difference is equal to 0 and month difference greater than 0 then return 45 * month difference
– if if year difference is equal to 0 and month difference equals to 0 and day diff greater than 0 then return 15 * day diff
– otherwise return 0.

I created solution in 4 languages:

Scala
Java
JavaScript
Ruby

All solutions are also available on my GitHub.

Scala

object LibraryFine extends App
{
  val consoleReader = io.Source.stdin.bufferedReader()
  val actualDate = consoleReader.readLine().split(" ").map(_.toInt)
  val expectedDate = consoleReader.readLine().split(" ").map(_.toInt)

  val yearDiff = actualDate(2) - expectedDate(2)
  val monthDiff = actualDate(1) - expectedDate(1)
  val dayDiff = actualDate(0) - expectedDate(0)

  def fee(year: Int, month: Int, day: Int): Int =
  {
    if(year > 0) return 10000
    if(year == 0 && month > 0) return month * 500
    if(year == 0 && month == 0 && day > 0) return day * 15
    return 0
  }

  println(fee(yearDiff, monthDiff, dayDiff))
}

object LibraryFine extends App

{

val consoleReader = io.Source.stdin.bufferedReader()

val actualDate = consoleReader.readLine().split(" ").map(_.toInt)

val expectedDate = consoleReader.readLine().split(" ").map(_.toInt)

val yearDiff = actualDate(2) - expectedDate(2)

val monthDiff = actualDate(1) - expectedDate(1)

val dayDiff = actualDate(0) - expectedDate(0)

def fee(year: Int, month: Int, day: Int): Int =

{

if(year > 0) return 10000

if(year == 0 && month > 0) return month * 500

if(year == 0 && month == 0 && day > 0) return day * 15

return 0

}

println(fee(yearDiff, monthDiff, dayDiff))

}

Java

import java.util.Scanner;

public class LibraryFine
{
    public static void main(String[] args)
    {
        Scanner stdin = new Scanner(System.in);
        int actualDay = stdin.nextInt();
        int actualMonth = stdin.nextInt();
        int actualYear = stdin.nextInt();
        int expectedDay = stdin.nextInt();
        int expectedMonth = stdin.nextInt();
        int expectedYear = stdin.nextInt();

        int yearDiff = actualYear - expectedYear;
        int monthDiff = actualMonth - expectedMonth;
        int dayDiff = actualDay - expectedDay;

        System.out.println(fee(yearDiff, monthDiff, dayDiff));
    }

    private static int fee(int year, int month, int day)
    {
        if(year > 0) return 10000;
        if(year == 0 && month > 0) return month * 500;
        if(year == 0 && month == 0 && day > 0) return day * 15;
        return 0;
    }
}

import java.util.Scanner;

public class LibraryFine

{

public static void main(String[] args)

{

Scanner stdin = new Scanner(System.in);

int actualDay = stdin.nextInt();

int actualMonth = stdin.nextInt();

int actualYear = stdin.nextInt();

int expectedDay = stdin.nextInt();

int expectedMonth = stdin.nextInt();

int expectedYear = stdin.nextInt();

int yearDiff = actualYear - expectedYear;

int monthDiff = actualMonth - expectedMonth;

int dayDiff = actualDay - expectedDay;

System.out.println(fee(yearDiff, monthDiff, dayDiff));

}

private static int fee(int year, int month, int day)

{

if(year > 0) return 10000;

if(year == 0 && month > 0) return month * 500;

if(year == 0 && month == 0 && day > 0) return day * 15;

return 0;

}

JavaScript

function processData(input) {
    var lines = input.split("\n");
    var actualDate = lines[0].split(" ");
    var expectedDate = lines[1].split(" ");

    var yearDiff = parseInt(actualDate[2]) - parseInt(expectedDate[2]);
    var monthDiff = parseInt(actualDate[1]) - parseInt(expectedDate[1]);
    var dayDiff = parseInt(actualDate[0]) - parseInt(expectedDate[0]);

    console.log(fee(yearDiff, monthDiff, dayDiff));
}

function fee(year, month, day)
{
    if(year > 0) return 10000;
    if(year == 0 && month > 0) return month * 500;
    if(year == 0 && month == 0 && day > 0) return day * 15;
    return 0;
}
process.stdin.resume();
process.stdin.setEncoding("ascii");
_input = "";
process.stdin.on("data", function (input) {
    _input += input;
});

process.stdin.on("end", function () {
    processData(_input);
});

function processData(input) {

var lines = input.split("\n");

var actualDate = lines[0].split(" ");

var expectedDate = lines[1].split(" ");

var yearDiff = parseInt(actualDate[2]) - parseInt(expectedDate[2]);

var monthDiff = parseInt(actualDate[1]) - parseInt(expectedDate[1]);

var dayDiff = parseInt(actualDate[0]) - parseInt(expectedDate[0]);

console.log(fee(yearDiff, monthDiff, dayDiff));

}

function fee(year, month, day)

{

if(year > 0) return 10000;

if(year == 0 && month > 0) return month * 500;

if(year == 0 && month == 0 && day > 0) return day * 15;

return 0;

}

process.stdin.resume();

process.stdin.setEncoding("ascii");

_input = "";

process.stdin.on("data", function (input) {

_input += input;

});

process.stdin.on("end", function () {

processData(_input);

});

Ruby

(actual_day, actual_month, actual_year) = gets.to_s.split(" ").map { |s| s.to_i }
(expected_day, expected_month, expected_year) = gets.to_s.split(" ").map { |s| s.to_i }

year_diff = actual_year - expected_year
month_diff = actual_month - expected_month
day_diff = actual_day - expected_day

def fee(year, month, day)
  if year > 0
    return 10000
  end
  if year == 0 && month > 0
    return month * 500
  end
  if year == 0 && month == 0 && day > 0
    return day * 15
  end
  return 0
end

puts fee(year_diff, month_diff, day_diff)

(actual_day, actual_month, actual_year) = gets.to_s.split(" ").map { |s| s.to_i }

(expected_day, expected_month, expected_year) = gets.to_s.split(" ").map { |s| s.to_i }

year_diff = actual_year - expected_year

month_diff = actual_month - expected_month

day_diff = actual_day - expected_day

def fee(year, month, day)

if year > 0

return 10000

end

if year == 0 && month > 0

return month * 500

end

if year == 0 && month == 0 && day > 0

return day * 15

end

return 0

end

puts fee(year_diff, month_diff, day_diff)

Pavol Pidanič

I can count to 1023 with 10 fingers

Hackerrank – Library Fine