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🚧 Commence le jour 7

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Clément 11 months ago
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cc8b9b54f2
  1. 41
      day_7/part_1.php

41
day_7/part_1.php

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<?php
// parse tree
$possible_bags = [];
$rules = explode("\n", file_get_contents('input.txt'));
foreach ($rules as $rule) {
[$current_bag, $inside_bags] = explode(' contain ', $rule);
$current_bag = substr($current_bag, 0, -5);
if ($inside_bags === 'no other bags.') {
$possible_bags[$current_bag] = [];
} else {
$inside_bags = explode(', ', $inside_bags);
$parsed_inside_bags = [];
foreach ($inside_bags as $inside_bag) {
preg_match ('/\d+ (.*) bags?\.?/uU', $inside_bag, $bag);
$parsed_inside_bags[] = $bag[1];
}
$possible_bags[$current_bag] = $parsed_inside_bags;
}
}
function has_shiny_in($total_list, $shiny_list = ['shiny gold'])
{
$at_least_one_add = false;
foreach ($total_list as $bag => $item) {
if (!in_array($bag, $shiny_list, true) && count(array_intersect($shiny_list, $item)) > 0) {
$at_least_one_add = true;
$shiny_list[] = $bag;
}
}
if ($at_least_one_add) {
return has_shiny_in($total_list, $shiny_list);
}
return $shiny_list;
}
var_dump(has_shiny_in($possible_bags));
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