Created
January 3, 2019 18:02
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solution for https://www.hackerrank.com/challenges/sock-merchant/
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| <?php | |
| // Complete the sockMerchant function below. | |
| function sockMerchant($n, $ar) { | |
| $arnew = array(); | |
| $cnt=0; | |
| foreach($ar as $val){ | |
| if (isset($arnew[$val])){ | |
| $cnt++; | |
| unset($arnew[$val]); | |
| } | |
| else{ | |
| $arnew[$val]=1; | |
| } | |
| } | |
| return $cnt; | |
| } | |
| $fptr = fopen(getenv("OUTPUT_PATH"), "w"); | |
| $stdin = fopen("php://stdin", "r"); | |
| fscanf($stdin, "%d\n", $n); | |
| fscanf($stdin, "%[^\n]", $ar_temp); | |
| $ar = array_map('intval', preg_split('/ /', $ar_temp, -1, PREG_SPLIT_NO_EMPTY)); | |
| $result = sockMerchant($n, $ar); | |
| fwrite($fptr, $result . "\n"); | |
| fclose($stdin); | |
| fclose($fptr); | |
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How??? does this work? It passes all tests!