SWUST OJ(1028)

 1 #include <iostream>
 2 #include <cstdlib>
 3 #include <stack>
 4 #include <string>
 5 using namespace std;
 6 
 7 int main()
 8 {
 9     stack<char> s;
10     stack<char> s1;
11     char c, c1;
12     string str;
13     cin>>str;
14     int i=0;
15     while(1)
16     {
17         c = str[i];
18         if (c == ‘#‘)
19         {
20             break;
21         }
22         s.push(c);
23         i++;
24     }
25 
26     while(1)
27     {
28         c1 = s.top();
29         s.pop();
30         if (c1 == ‘@‘)
31         {
32             break;
33         }
34         s1.push(c1);
35     }
36     
37     if (s.size()!=s1.size())
38     {
39         cout<<"no!";
40         return 0;
41     }
42 
43     while(!s.empty())
44     {
45         if(s.top()!=s1.top())
46         {
47             cout<<"no!";
48             return 0;
49         }
50         s.pop();
51         s1.pop();
52     }
53 
54     cout<<"yes!";
55 
56     return 0;
57 }