1 #include <iostream>
 2 
 3 using namespace std;
 4 
 5 int main()
 6 {
 7     int numberOfSeat, numberOfBook = 0;
 8     char seats[50];
 9     while(cin>>numberOfSeat)
10     {
11         cin>>seats;
12         for(int i = 0; i < numberOfSeat; i++)
13         {
14             if(seats[i] == '*')    // if the current char is '*', we just move one step
15                 continue;
16             else                   // if the current char is '@', we move two steps, no matter what the next char is
17             {
18                 i++;
19                 numberOfBook++;
20             }
21         }
22         if(numberOfBook == 0)
23             cout<<"Oh no!"<<endl;
24         else
25             cout<<numberOfBook<<endl;
26         numberOfBook = 0;
27     }
28 }