#webkul pattern program round 1 
#pattern runs for odd number like min 3 , 5, 7 etc
#here is ther pattern
#for n==3
*       *
**     **
***@@@***
   @@@
   @@@
   ***
    *
#for n==5 
*             *
**           **
***         ***
****       ****
*****@@@@@*****
     @@@@@
     @@@@@
     @@@@@
     @@@@@
     *****
      ***
       *
#and so on for n==7.....
#here is the program




#include <iostream>
using namespace std;
using std::cout;
using std::cin;
using std::endl;

int main(){
    int n=3;
    
    // 1st part
    
    for(int i=0;i<n-1;i++){
        for(int j=0;j<=i;j++){
            cout<<'*';
        }
        for(int j=0;j<(3*n-(2+2*i));j++){
            cout<<" ";
        }
         for(int j=0;j<=i;j++){
            cout<<'*';
        }
        cout<<endl;
    }
    
    //2nd part
    
    for(int i=0;i<1;i++){
        for(int j=0;j<n;j++){
            cout<<'*';
        }
        for(int j=0;j<n;j++){
            cout<<"@";
        }
       for(int j=0;j<n;j++){
            cout<<'*';
        }
        cout<<endl;
    }
    
    //3rd Part
    
    for(int i=0;i<n-1;i++){
        for(int j=0;j<n;j++){
            cout<<" ";
        }
        for(int j=0;j<n;j++){
            cout<<"@";
        }
        cout<<endl;
    }
    
    //4th part
    
    for(int i=0;i<(n/2)+1;i++){
        for(int j=0;j<(n+i);j++){
            cout<<" ";
        }
        for(int j=0;j<(n-2*i);j++){
            cout<<"*";
        }
        cout<<endl;
    }
    
    
    
    return 0;
}