第三周 分析程序题

 1 using System;  
 2 using System.Collections.Generic;  
 3 using System.Text;  
 4    
 5 namespace FindTheNumber  
 6 {  
 7      class Program  
 8      {  
 9           static void Main(string[] args)  
10           {  
11                int [] rg =  
12                {2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,  
13                18,19,20,21,22,23,24,25,26,27,28,29,30,31};  
14    
15                for(Int64 i = 1; i < Int64.MaxValue; i++)  
16                {  
17                     int hit = 0;  
18                     int hit1 = -1;  
19                     int hit2 = -1;  
20                     for (int j = 0; (j < rg.Length) && (hit <= 2); j++)  
21                     {  
22                           if((i % rg[j]) != 0)  
23                           {  
24                                hit++;  
25                                if(hit == 1)  
26                                {  
27                                     hit1 = j;  
28                                }  
29                                else if (hit == 2)  
30                                {  
31                                     hit2 = j;  
32                                }  
33                                else  
34                                     break;   
35    
36                           }  
37                     }  
38    
39                     if((hit == 2) && (hit1 + 1 == hit2))  
40                     {  
41                           Console.WriteLine("found {0}", i);  
42                     }  
43    
44                }  
45           }  
46      }  
47 }