read a b for((z=17,y=$a%2;y<z;z=s<y++||z<s?z:s));{ for((o=a+y-2>>1,p=0;s=--o*p++-b+y,o&&s<y;));{ :;} }&&echo $z&&. *
Note that non-ascii characters in the above source code will be escaped (such as \x9f).
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