private static bool CanForm(Coordinates point1, Coordinates point2, Coordinates point3)
{
double sideA = GetLenght(point1, point2);
double sideB = GetLenght(point2, point3);
double sideC = GetLenght(point1, point3);
if (sideA + sideB > sideC && sideB + sideC > sideA && sideA + sideC > sideB)
{
return true;
}
else
{
return false;
}
}
private static double GetLenght(Coordinates point1, Coordinates point2)
{
double d = Math.Sqrt(Math.Pow(point2.x - point1.x, 2) + Math.Pow(point2.y - point1.y, 2));
return d;
}
private static void Main(string[] args)
{
Thread.CurrentThread.CurrentCulture = CultureInfo.InvariantCulture;
Coordinates a = new Coordinates();
Coordinates b = new Coordinates();
Coordinates c = new Coordinates();
a.x = int.Parse(Console.ReadLine());
a.y = int.Parse(Console.ReadLine());
b.x = int.Parse(Console.ReadLine());
b.y = int.Parse(Console.ReadLine());
c.x = int.Parse(Console.ReadLine());
c.y = int.Parse(Console.ReadLine());
if (CanForm(a, b, c))
{
double lenghtA = GetLenght(a, b);
double lenghtB = GetLenght(b, c);
double lenghtC = GetLenght(a, c);
Console.WriteLine("Yes");
Console.WriteLine(string.Format("{0:0.00}",Math.Round(area(lenghtA, lenghtB, lenghtC), 2)));
}
else
{
Console.WriteLine("No");
Console.WriteLine(string.Format("{0:0.00}", Math.Round(GetLenght(a, b), 2)));
}
}