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13 lines
189 B
Racket
13 lines
189 B
Racket
9 years ago
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#lang br/ragg
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## Equal numbers of 0 and 1s in a string.
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##
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## (Thanks to mithos28 for this one.)
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equal : [zero one | one zero]
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zero : "0" equal | equal "0"
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one : "1" equal | equal "1"
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