use warnings; use strict; my $ans=0; for(1..10000) { $ans++ if (f($_) % 2 == 1); } print $ans; sub f { my $N = shift; return rec($N, 1, - int(sqrt($N)), 1, {}); } sub rec { no warnings 'recursion'; my ($N, $k, $l, $m, $ht) = @_; my $n_m = …

借りてきたラクダ本に力をわけてもらった. まだ1章だけど. リストコンテキストはちょっと楽しい. #!/usr/bin/env perl use strict; use warnings; my (%count, %min); for(my $i=1;;$i++) { my $cube = $i**3; my $key = join '', sort $cube =~ /./go; $min…

Perlの練習ということで #!/usr/bin/perl use strict; use warnings; my @paths; $paths[$_] = [] for(0..99); push(@{$paths[target($_)]}, [{8 => 1}, [source($_), target($_)]]) for (polygonals(8)); for(3..7) { my @prev = @paths; $paths[$_] = [] f…