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