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@ 2015-10-06T21:55:46Z

<?php

function isPerfect($n) {
	return $n[0]*$n[1]*$n[2]*$n[3]+1;
}

var_dump(isPerfect(['a','b','c','d']));

Output
Performance
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var_dump: documentation ( source)

preferences:dark modelive preview

62.6 ms | 402 KiB | 5 Q