using System;

namespace DistanceTask
{
    public static class DistanceTask
    {
        // Расстояние от точки (x, y) до отрезка AB с координатами A(ax, ay), B(bx, by)
        public static double GetDistanceToSegment(double ax, double ay, double bx, double by, double x, double y)
        {
            var sectionAB = Math.Sqrt(Math.Pow(ax - bx, 2) + Math.Pow(ay - by, 2));
            var sectionBC = Math.Sqrt(Math.Pow(x - bx, 2) + Math.Pow(y - by, 2));
            var sectionAC = Math.Sqrt(Math.Pow(ax - x, 2) + Math.Pow(ay - y, 2));
            var cosABBC = (x - ax) * (bx - ax) + (y - ay) * (by - ay) / (sectionAB * sectionBC);
            var cosABAC = (ax - bx) * (x - bx) + (ay - by) * (ay - y) / (sectionAB * sectionAC);
            var properiter = ((sectionAB + sectionAC + sectionBC) / 2);
            var S = Math.Sqrt(properiter * (properiter - sectionAB) * (properiter - sectionBC) * (properiter - sectionAC));

            if ((cosABAC >= 0 && cosABAC < 1) && (cosABBC >= 0 && cosABBC < 1))
                return (2 * s) / sectionAB;

                return

        }
    }