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x%y|odd$x*y,x>1=(`div`2)<$>[x,y]|1<2=[0,0]
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*EDIT: -4 bytes thanks to a trick from Arnauld's answer.EDIT: -4 bytes thanks to a trick from Arnauld's answer.
*EDIT: -4 bytes thanks to a trick from Arnauld's answer.
EDIT: -4 bytes thanks to a trick from Arnauld's answer.
