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abraskin@mbusd.org 2015_quarter_exam_practice > numO
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Return a String representation of a positive integer number where each zero has been replaced by a capital letter "O"


numO(3210) → "321O"
numO(101010) → "1O1O1O"
numO(1234) → "1234"

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public String numO(int num) { }

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