19 lines
254 B
Perl
19 lines
254 B
Perl
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use 5.20.0;
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use List::AllUtils qw/ sum /;
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use Math::Prime::Util ':all';
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my $x = 34000000;
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my $house = 1;
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$house++ while( nbr_gifts($house) < $x );
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say $house;
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sub nbr_gifts {
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my $n = shift;
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11 * sum grep { 50 * $_ >= $n } divisors($n);
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}
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