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Re: Recurring Cycle of Fractions

by steph (Initiate)
on Oct 18, 2012 at 14:17 UTC ( #999743=note: print w/ replies, xml ) Need Help??

in reply to Recurring Cycle of Fractions

There you go

#!/usr/bin/perl use strict; use warnings; use bignum ( p => -9999 ); # this is huge, by the way my $limit = shift; # 1000 for project euler my $longest = 1; my $value; for my $val (1..$limit) { my $frac = 1/$val; if (reverse($frac) =~ /(\d+)\1+/) { my $longestSubChain = reverse($1); if ($longestSubChain =~ /(\d+?)\1+/) { if (length($1) > $longest) { $longest = length +($1); $value = $val; } } } } print "d = $value\n"; print "Longest recurring cycle: $longest";

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