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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. int main() {
  5.     int t;
  6.     cin >> t;
  7.     while (t--) {
  8.         int a;
  9.         cin>>a;
  10.         int b=2*a;
  11.         char ans[b + 1][b + 1];
  12.         int a1=0;
  13.         int i=0,j=0;
  14.         while(a1<=a)
  15.         {
  16.                 if(a1%2==0) 
  17.                 {
  18.                     j=0;
  19.                    if(j==0)
  20.                    {
  21.                        ans[i][j]='#';
  22.                         ans[i][j+1]='#';
  23.                         ans[i+1][j]='#';
  24.                         ans[i+1][j+1]='#';
  25.                         j+=2;
  26.                    }
  27.                     if(j>1)
  28.                    {
  29.                     while(j<=b)
  30.                     {
  31.                         ans[i][j]='#';
  32.                         ans[i][j+1]='#';
  33.                         ans[i+1][j]='#';
  34.                         ans[i+1][j+1]='#';
  35.                         j+=2;
  36.                     }
  37.                    }
  38.                     a1++;
  39.                     i+=2;
  40.                 }
  41.                 else if(a1%2!=0) {
  42.                     j=2;
  43.                     if(j==2)
  44.                     {
  45.                         ans[i][j]='#';
  46.                         ans[i][j+1]='#';
  47.                         ans[i+1][j]='#';
  48.                         ans[i+1][j+1]='#';
  49.                         j+=2;
  50.                     }
  51.                      if(j>2)
  52.                     {
  53.                     while(j<=b) 
  54.                     {
  55.                         ans[i][j]='#';
  56.                         ans[i][j+1]='#';
  57.                         ans[i+1][j]='#';
  58.                         ans[i+1][j+1]='#';
  59.                         j+=2;
  60.                     }
  61.                     }
  62.                     a1++;
  63.                     i+=2;
  64.                 }
  65.             }
  66.  
  67.  
  68.         for (int i=0;i<b;i++) 
  69.         {
  70.             for (int j=0;j<b;j++) 
  71.             {
  72.                 if (ans[i][j]!='#')
  73.                 {
  74.                     ans[i][j]='.';
  75.                 }
  76.             }
  77.         }
  78.  
  79.         for (int i=0;i<b;i++)
  80.         {
  81.             for (int j=0;j<b;j++) 
  82.             {
  83.                 cout<<ans[i][j];
  84.             }
  85.             cout<<endl;
  86.         }
  87.     }
  88.  
  89.     return 0;
  90. }
Success #stdin #stdout 0s 5284KB
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stdin
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stdout
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########
########
#.######
########
########
########
#.######
#.######
https://ideone.com/YQ0Ois
language:
C++14 (gcc 8.3)
created:
30 days ago
visibility:
public

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