Draw Hailstones

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Problem

I'm writing this while stuck inside during a blizzard.

--Histocrat

Options

exec is denied

no deadline, the server will not save your submission

Sample input:_

15

Sample output:

               0
                                              O
                       0
                                                                      O
                                   0
                                                                                                          O
                                                     0
                                                                                                                                                                0
                                                                                0
                                        0
                    0
          O
     0
                0
        0
    0
  O

Sample input:_

17

Sample output:

                 0
                                                    0
                          O
             0
                                        0
                    0
          O
     0
                0
        0
    0
  O

Sample input:_

28

Sample output:

                            0
              O
       0
                      O
           0
                                  O
                 0
                                                    0
                          O
             0
                                        0
                    0
          O
     0
                0
        0
    0
  O

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