HackerRank Library Fine: https://www.hackerrank.com/challenges/library-fine

library-fine.cs

/*
Author: Ali Bahraminezhad
Your local library needs your help! Given the expected and actual return dates for a library book, create a program that calculates the fine (if any).
https://www.hackerrank.com/challenges/library-fine
*/

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
class Solution
{

    static void Main(String[] args)
    {
        string[] tokens_d1 = Console.ReadLine().Split(' ');
        int d1 = Convert.ToInt32(tokens_d1[0]);
        int m1 = Convert.ToInt32(tokens_d1[1]);
        int y1 = Convert.ToInt32(tokens_d1[2]);
        string[] tokens_d2 = Console.ReadLine().Split(' ');
        int d2 = Convert.ToInt32(tokens_d2[0]);
        int m2 = Convert.ToInt32(tokens_d2[1]);
        int y2 = Convert.ToInt32(tokens_d2[2]);

        if (y1 < y2 || (y1 == y2 && m1 < m2) || (y1 == y2 && m1 == m2 && d1 <= d2)) // No Fine
            Console.WriteLine("0");
        else if (y1 == y2 && m1 == m2 && d1 > d2) // Fine per day
            Console.WriteLine((d1 - d2) * 15);
        else if (y1 == y2 && m1 > m2) // Fine per month
            Console.WriteLine((m1 - m2) * 500);
        else
            Console.WriteLine(10000);
    }
}