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  1. #!/usr/bin/perl
  2. $m = <> and map{ $s=' 'x$m and substr($s, $m-$_,2*$_+1)='*'x(2*$_+1) and print "$s\n"}(0..$m) and print ' 'x($m)."x\n";
Success #stdin #stdout 0s 3564KB
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stdout
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            *
           ***
          *****
         *******
        *********
       ***********
      *************
     ***************
    *****************
   *******************
  *********************
 ***********************
*************************
            x
https://ideone.com/4UbU8L
language:
Perl (perl 5.28.1)
created:
9 years ago
visibility:
public

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