using System;

public class Program

{

    private static int CountFolds(int X, int Y, int x, int y)

        {

            if ((x > Y || x > X) && (y > Y || y > X))

            {

                throw new ArgumentException("No solution");

            }

​

            var transfX = X > Y ? X : Y;

            var transfY = X > Y ? Y : X;

​

            var transfx = x > y ? x : y;

            var transfy = x > y ? y : x;

​

            var count = transfY / transfy + transfX / transfx;

​

            return count;

        }

    public static void Main()

    {

        Console.WriteLine(CountFolds(3, 9, 5, 2)); //2

        Console.WriteLine(CountFolds(8, 4, 3, 1)); //6

        Console.WriteLine(CountFolds(9, 4, 3, 2)); //5

        Console.WriteLine(CountFolds(12, 5, 5, 2)); //4

        Console.WriteLine(CountFolds(10, 12, 5, 6)); //4

        Console.WriteLine(CountFolds(100, 1, 2, 1)); //51

        Console.WriteLine(CountFolds(100, 10, 200, 2)); // 5

        Console.WriteLine(CountFolds(100, 1, 200, 2)); // no solution

        Console.WriteLine(CountFolds(3, 9, 5, 7)); // no solution

    }

}