part 1

2023/06/Part1.pm

@@ -0,0 +1,31 @@
+use 5.38.0;
+
+package Part1;
+
+use List::AllUtils qw/ product /;
+use POSIX qw/ floor ceil /;
+
+sub my_zip($a,$b) {
+    return map { [ $a->[$_], $b->[$_] ] }  0..$a->@*-1;
+}
+
+sub parse_file($input) {
+    my_zip( map { [/(\d+)/g ] } split "\n", $input );
+}
+
+sub race_solution($time,$distance) {
+    my $min = ( $time - sqrt( $time**2 - 4 * $distance) ) / 2;
+    my $max = ( $time + sqrt( $time**2 - 4 * $distance) ) / 2;
+
+    $min = int($min)+1;
+    $max = ($max == int $max)?$max-1:int $max;
+
+    warn "$min - $max";
+    return $max-$min+1;
+}
+
+sub solution_1 ($input) {
+    product map { race_solution(@$_)} parse_file($input);
+}
+
+1;

2023/06/Part2.pm

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+use 5.38.0;
+
+package Part2;
+
+use Part1;
+
+use List::AllUtils qw/ /;
+
+
+sub solution_2 ($input) {
+    ...;
+}
+
+1;

2023/06/benchmark.pl

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+use 5.38.0;
+
+use Benchmark ':hireswallclock';
+use Path::Tiny;
+use JSON qw/ to_json /;
+use DateTime;
+
+use Part1;
+use Part2;
+
+my $day = path('.')->absolute->basename =~ s/^0//r;
+my $year = path('.')->absolute->parent->basename;
+
+my @parts = (
+    { part => 1, sub => \&Part1::solution_1, expected => 'TODO' },
+    { part => 2, sub => \&Part2::solution_2, expected => 'TODO' },
+);
+
+my $input = path('./input')->slurp;
+
+for my $part (@parts) {
+    my $res = Benchmark::countit(
+        10,
+        sub {
+            $part->{sub}->($input) == $part->{expected} or die;
+        }
+    );
+
+    my $result = {
+        day  => $day,
+        year => $year,
+
+        #variant => '',
+        language  => 'perl',
+        part      => $part->{part},
+        time      => $res->cpu_a / $res->iters,
+        timestamp => DateTime->now->iso8601,
+    };
+    say to_json $result;
+}
+

2023/06/example

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+Time:      7  15   30
+Distance:  9  40  200

2023/06/part1.t

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+use 5.38.0;
+
+use Test2::V0;
+
+use Path::Tiny;
+
+use Part1;
+
+my $input = path('input')->slurp;
+my $example = path('example')->slurp;
+
+is [ map { Part1::race_solution(@$_)} Part1::parse_file($example)]
+    => [4,8,9];
+
+is Part1::solution_1($example) => 288;
+
+cmp_ok Part1::solution_1($input), '<' ,230202;
+is Part1::solution_1($input) => 'TODO';
+
+done_testing;

2023/06/part2.t

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+use 5.38.0;
+
+use Test2::V0;
+
+use Path::Tiny;
+
+use Part2;
+
+my $input = path('input')->slurp;
+
+is Part2::solution_2($input) => 'TODO';
+
+done_testing;

2023/06/solutions.yml

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+1: 211904
+2: TODO