求M选N算法十分急求高手_ASP.NET

求M选N算法非常急求高手
如题 C# 比如5选3

最后输出
123**
12*4*
12**5
1*34*
1*3*5
1**45
*234*
*23*5
*2*45
**345

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C# code

using System;using System.Collections.Generic;using System.Linq;using System.Text;namespace ConsoleApplication1{    class Program    {        static void Main(string[] args)        {            string s = "12345";            var query = from x in s                        from y in s                        where x != y                        select s.Replace(x, '*').Replace(y, '*');            foreach (var item in query)                Console.WriteLine(item);        }    }}
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C# codeusing System;using System.Collections.Generic;using System.Linq;using System.Text;namespace ConsoleApplication1{    class Program    {        static void Main(string[] args)        {            string s = "12345";            var query = (from x in s                        from y in s                        where x != y                        orderby x + y descending                        select s.Replace(x, '*').Replace(y, '*')).Distinct();            foreach (var item in query)                Console.WriteLine(item);        }    }}
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探讨
这个能通用吗 可能有8选5 7选3 等等

求M选N算法 十分急 求高手

求M选N算法十分急求高手