Shikiryu/advent_of_code_2020
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✨ Finit le 2eme jour

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Clément 2020-12-03 12:27:47 +01:00
parent 44837f9672
commit fa2132ad25
2 changed files with 41 additions and 0 deletions
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21
day_2/part_1.php Normal file
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<?php
$passwords = explode("\n", file_get_contents('input.txt'));
$number_of_good_passwords = 0;
foreach ($passwords as $password) {
$parts = explode(' ', $password);
if (count($parts) === 3) {
[$min, $max] = explode('-', $parts[0]);
$letter = $parts[1][0];
$word = $parts[2];
$chars = count_chars($word, 1);
if ($min <= $chars[ord($letter)] && $max >= $chars[ord($letter)]) {
$number_of_good_passwords++;
}
}
}
echo $number_of_good_passwords;
exit(0);

20
day_2/part_2.php Normal file
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<?php
$passwords = explode("\n", file_get_contents('input.txt'));
$number_of_good_passwords = 0;
foreach ($passwords as $password) {
$parts = explode(' ', $password);
if (count($parts) === 3) {
[$min, $max] = explode('-', $parts[0]);
$letter = $parts[1][0];
$word = $parts[2];
if ($word[$min-1] === $letter xor $word[$max-1] === $letter) {
$number_of_good_passwords++;
}
}
}
echo $number_of_good_passwords;
exit(0);