diff options
Diffstat (limited to '2.pl')
-rwxr-xr-x | 2.pl | 18 |
1 files changed, 0 insertions, 18 deletions
@@ -1,18 +0,0 @@ -#!/usr/bin/perl -use strict; -use warnings; - -my $root5 = sqrt 5; -my $phi = (1 + $root5)/2; - -sub fib { int (($phi**$_[0]-(1-$phi)**$_[0])/$root5 + 0.5) } - -my $i = 0; -my $sum = 0; -while (1) { - $i++; - my $n = fib $i; - last if $n > 1000000; - $sum += $n if $n % 2 == 0; -} -print "$sum\n"; |