m@main=getLine>>=putStrLn.head.foldl(#)["",""]>>m u@(v:w:x)#y|y:v==")"=(w++[y]):x|v==""=[y]:w:x|y<')'="":u|0<1=('(':w++' ':v++[y]):x
Note that non-ascii characters in the above source code will be escaped (such as \x9f).
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