for(;r=readline();print(function f(q,p,c){return~(p='+-*/'.indexOf(c=r[--i]))&&(c+=f(p),c=f(p&=2)+c,q>p)?'('+c+')':c}()))i=r[-1]
Note that non-ascii characters in the above source code will be escaped (such as \x9f).
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