The Card Number Validation hole will go live in . Why not try and solve it ahead of time?

mathislife22

7,047
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6,986
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⛳

11 / 108 Holes

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2 / 58 Langs

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7 / 75 Cheevos

📅

Number Spiral in Java in Chars Play Hole

29th in Java and 1,007th overall.

Last tested .

Bytes Chars Submitted
565 565
583 583