水仙花数

<?php
    for($a=1; $a<10; $a++)
    {
        for($b=0; $b<10; $b++)
        {
            for($c=0; $c<10; $c++)
            {
                if(($a*$a*$a+$b*$b*$b+$c*$c*$c)==(100*$a+10*$b+$c))
                {
                    echo 100*$a+10*$b+$c."<br>";
                 }
             }
        }
    }
?>
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