stack HDU1022

 1 #include <iostream>
 2 #include <stack>
 3 #include <cstring>
 4 
 5 using namespace std;
 6 
 7 char target[10000];
 8 char source[10000];
 9 int arr[10000];
10 
11 int main()
12 {
13     stack<char>s;
14     int n;
15     while(cin>>n)
16     {
17         while(!s.empty())
18             s.pop();
19         memset(arr,0,sizeof(arr));
20         cin>>source;
21         cin>>target;
22         int t1=0;
23         int t2=0;
24         int flag=1;
25         int tt=1;
26         while(t1<n)
27         {
28            if(source[t2]==target[t1])
29            {
30                arr[tt]=1;
31                tt++;
32                arr[tt]=2;
33                tt++;
34                t1++;
35                t2++;
36            }
37            else if(!s.empty()&&s.top()==target[t1])
38            {
39                arr[tt]=2;
40                tt++;
41                s.pop();
42                t1++;
43            }
44            else if(t2<n)
45            {
46                s.push(source[t2]);
47                arr[tt]=1;
48                tt++;
49                t2++;
50            }
51            else
52            {
53                flag=0;
54                break;
55            }
56         }
57         if(tt==2*n+1)
58         {
59             cout<<"Yes.\n";
60             for(int i=1;i<tt;i++)
61             {
62                 if(arr[i]==1)
63                     cout<<"in\n";
64                 if(arr[i]==2)
65                     cout<<"out\n";
66             }
67             cout<<"FINISH\n";
68         }
69         else
70         {
71             cout<<"No.\n";
72             cout<<"FINISH\n";
73         }
74     }
75     return 0;
76 }