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- #!/usr/bin/perl
- # Author: Daniel "Trizen" Șuteu
- # License: GPLv3
- # Website: https://github.com/trizen
- # https://projecteuler.net/problem=43
- # Runtime: 3.210s
- use 5.010;
- use strict;
- use integer;
- use ntheory qw(forperm);
- my $sum = 0;
- my @digits = 0 .. 9;
- forperm {
- my ($d1, $d2, $d3, $d4, $d5, $d6, $d7, $d8, $d9, $d10) = @digits[@_];
- if ( $d1 != 0
- and "$d2$d3$d4" % 2 == 0
- and "$d3$d4$d5" % 3 == 0
- and "$d4$d5$d6" % 5 == 0
- and "$d5$d6$d7" % 7 == 0
- and "$d6$d7$d8" % 11 == 0
- and "$d7$d8$d9" % 13 == 0
- and "$d8$d9$d10" % 17 == 0) {
- $sum += "$d1$d2$d3$d4$d5$d6$d7$d8$d9$d10";
- }
- } scalar(@digits);
- say $sum;
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