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27 lines
485 B
PHP
27 lines
485 B
PHP
<?php
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$maintab = array();
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$lines = (int) fgets(STDIN);
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$result = 0;
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$i = 0;
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while ($i < $lines) {
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$nbr = fgets(STDIN);
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$nbr = trim($nbr);
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$c = strlen($nbr);
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$tab = &$maintab;
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for ($j = 0; $j < $c; $j++) {
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$number = $nbr[$j];
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if (!isset($tab[$number])) {
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$tab[$number] = array();
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$result++;
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$tab =& $tab[$number];
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} else {
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$tab =& $tab[$number];
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}
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}
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$i++;
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}
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echo $result;
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