4 in 3 by teebee

import java.util.*;enum F{F;System z;float a;{for(Scanner s=new Scanner(z.in);s==s;z.out.printf("%.2f\n",a/=a/s.nextInt()+1))a=s.nextInt();}}

Note that non-ascii characters in the above source code will be escaped (such as \x9f).

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