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f=pryr::f(`if`(n>1,1+f(log(n)),0))
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A non-recursive approach is possible: 3536 bytes and takes input from stdin. It outputs FALSE instead of 0 but is otherwise correct.
FALSE
0
n=scan() while((n=log(n))>0)F=F+1 F+F
A non-recursive approach is possible: 35 bytes and takes input from stdin. It outputs FALSE instead of 0 but is otherwise correct.
n=scan() while((n=log(n))>0)F=F+1 F
A non-recursive approach is possible: 36 bytes and takes input from stdin.
n=scan() while((n=log(n))>0)F=F+1 +F
