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Logic-2 > blackjack
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Given 2 int values greater than 0, return whichever value is nearest to 21 without going over. Return 0 if they both go over.

blackjack(19, 21) → 21
blackjack(21, 19) → 21
blackjack(19, 22) → 19

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public int blackjack(int a, int b) { }


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