24 lines
655 B
PHP
24 lines
655 B
PHP
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<?php
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function single_number($arr)
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{
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$ones = 0;
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$twos = 0;
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$common_one_two = 0;
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for($i=0; $i<sizeof($arr); $i++)
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{
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$twos = $twos | ($ones & $arr[$i]);
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$ones = $ones ^ $arr[$i];
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$common_one_two = ~($ones & $twos);
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$ones &= $common_one_two;
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$twos &= $common_one_two;
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}
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return $ones;
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}
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$arr1 = array(5, 3, 4, 3, 5, 5, 3);
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$arr2 = array(-1, 1, 1, -1, -1, 1, 0);
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print_r($arr1);
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print_r('Single Number: '.single_number($arr1)."\n");
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print_r($arr2);
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print_r('Single Number: '.single_number($arr2)."\n");
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?>
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