CirclesIntersection

using System;
using System.Linq;

namespace _03.CirclesIntersection
{
    class StartUp
    {
        static void Main()
        {
            int[] firstCircle = Console.ReadLine().Split().Select(int.Parse).ToArray();
            int[] secondCircle = Console.ReadLine().Split().Select(int.Parse).ToArray();

            Circle c1 = new Circle();
            c1.Radius = firstCircle[2];
            Point c1Center = new Point();
            c1Center.x = firstCircle[0];
            c1Center.y = firstCircle[1];

            Circle c2 = new Circle();
            c2.Radius = secondCircle[2];
            Point c2Center = new Point();
            c2Center.x = secondCircle[0];
            c2Center.y = secondCircle[1];

            double distance = CalcDistance(c1Center, c2Center);
            if (Intersect(c1, c2, distance))
            {
                Console.WriteLine("Yes");
            }
            else
            {
                Console.WriteLine("No");
            }
        }

        private static double CalcDistance(Point c1Center, Point c2Center)
        {
            double distance = Math.Sqrt(Math.Pow((c1Center.x - c2Center.x), 2) + Math.Pow((c1Center.y - c2Center.y), 2));

            return distance;
        }

        static bool Intersect(Circle c1, Circle c2,double distance)
        {
            if (distance <= c1.Radius + c2.Radius)
            {
                return true;
            }
            return false;
        }
    }

    class Circle
    {
        public double Center { get; set; }

        public double Radius { get; set; }
    }

    class Point
    {
        public int x { get; set; }

        public int y { get; set; }
    }
}