14. 区间相交

　有n个左右端点都为整数的区间，判断每个区间是否有与其它某个区间相交（区间端点重合也算相交）。

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace ConsoleApplication11
{
    class Program
    {
        static void Main(string[] args)
        {
            Interval a = new Interval(1, 4);
            Interval b = new Interval(6, 9);
            Interval c = new Interval(4, 5);
            Interval[] input = { a, b, c };
            bool[] result;
            Intersected(input, out result);
            foreach (var item in result)
            {
                Console.WriteLine(item);
            }
        }

        static void Intersected(Interval[] input, out bool[] result)
        {
            result = new bool[input.Length];
            for (int i = 0; i < result.Length; i++)
            {
                result[i] = false;
            }

            for (int i = 0; i < input.Length; i++)
            {
                if (result[i]==false)
                {
                    for (int j = i+1; j < input.Length; j++)
                    {
                        if ((input[i].start>=input[j].start&&input[i].start<=input[j].end)||(input[i].end>=input[j].start&&input[i].end<=input[j].end))
                        {
                            result[i] = true;
                            result[j] = true;
                        }
                    }
                }
            }
        }
    }

    public struct Interval
    {
        public int start;
        public int end;
        public Interval(int x, int y)
        {
            start = x;
            end = y;
        }
    }
}