百钱买鸡

Question

            for (Int32 x = 0; x < 20; x++)
            { 
                if(((3*x+300) % 4)!=0)continue;
                Int32 z=(3*x+300)/4;
                Int32 y = 100 - x-z;
                if (x < 0 || y < 0) continue;
                Console.WriteLine("5元的"+x+"只,"+"3元的"+(100-x-z)+"只,"+"1元的"+z);
                
            }
            Console.Read();

Answer 1

        private static  void suanfa()
        {
            int X = 0;
            int Y = 0;
            int Z = 0;
            for (; X < 20; X++)
            {
                for (Y = 0; Y < 34; Y++)
                {
                    for (Z = 0; Z < 100; Z++)
                    {
                        if (Z % 3 != 0)
                            continue;
                        if (5 * X + 3 * Y + Z / 3 != 100)
                            continue;
                        if (X + Y + Z != 100)
                            continue;
                        //  x = X; y = Y; z = Z;
                        //  return;
                        Console.WriteLine(string.Format("x={0};y={1};z={2}", X, Y, Z));
                    }
                }
            }
            //  x = 0; y = 0; z = 0;        }
结果：

Answer 2

结果：
x=0;y=25;z=75;
x=4,y=18;z=78;
x=8;y=11;z=81;
x=12,y=4;z=84;