HDU 1181 - 变形课

 1 #include <iostream>
 2 #include <cstring>
 3 #include <string>
 4 #include <algorithm>
 5 using namespace std;
 6 string b;
 7 char lef[1000],rig[1000];
 8 int flag[1000];
 9 int num;
10 bool ans;
11 void srh(char x)
12 {
13    for(int i=1;i<=num;i++)
14    {
15         if(lef[i]==x&&flag[i]==0)
16         {
17             if(rig[i]==‘m‘)
18             {
19                 ans=1;
20                 break;
21             }
22             else
23             {
24                 flag[i]=1;
25                 srh(rig[i]);
26                 flag[i]=0;
27             }
28         }
29    }
30 }
31 int main()
32 {
33     while(cin>>b)
34     {
35         ans=0;
36         num=1;
37         memset(lef,0,sizeof(lef));
38         memset(flag,0,sizeof(flag));
39         lef[1]=b[0];
40         rig[1]=b[b.length()-1];
41         for(int i=2;;i++)
42         {
43             cin>>b;
44             if(b[0]==‘0‘) break;
45             lef[i]=b[0];
46             rig[i]=b[b.length()-1];
47             num++;
48         }
49         for(int i=1;i<=num;i++)
50         {
51             if(ans) break;
52             if(lef[i]==‘b‘&&flag[i]==0)
53                 if(rig[i]==‘m‘)
54                 {
55                     ans=1;
56                     break;
57                 }
58                 else
59                 {
60                     flag[i]=1;
61                     srh(rig[i]);
62                     flag[i]=0;
63                 }
64     
65         }
66         if(ans) cout<<"Yes."<<endl;
67         else cout<<"No."<<endl;
68     }
69 }