Programming basics Exam 18Dec 02. Change Tiles

using System;
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namespace Testing
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{
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    class MainClass
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    {
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        public static void Main (string[] args)
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        {
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            var money = decimal.Parse (Console.ReadLine ());
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            var florWidth = decimal.Parse (Console.ReadLine ());
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            var florLength = decimal.Parse (Console.ReadLine ());
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            var trianglSide = decimal.Parse (Console.ReadLine ());
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            var triangleHigh = decimal.Parse (Console.ReadLine ());
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            var blockPrice = decimal.Parse (Console.ReadLine ());
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            var priceForWork = decimal.Parse (Console.ReadLine ());
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            var florArea = florWidth * florLength;
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            var blockArea = trianglSide * triangleHigh / 2;
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            var blockNeed = Math.Ceiling (florArea / blockArea) + 5;
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            //var  blockNeed2 = Math.Ceiling (florArea / blockArea) + 5;
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            var totalCost = blockNeed * blockPrice + priceForWork;
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            var moneyLeft = money - totalCost;
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            if (moneyLeft >= 0) {
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                Console.WriteLine ("{0:f2} lv left.", moneyLeft);
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            }
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            else {
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                Console.WriteLine ("You'll need {0:f2} lv more.", totalCost - money);
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            }
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        }
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    }
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}
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