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merge.php
52 lines (43 loc) · 907 Bytes
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merge.php
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<?php
function mergeSort($array)
{
if(count($array) == 1 )
{
return $array;
}
$mid = count($array) / 2;
$left = array_slice($array, 0, $mid);
$right = array_slice($array, $mid);
$left = mergeSort($left);
$right = mergeSort($right);
return merge($left, $right);
}
function merge($left, $right)
{
$res = array();
while (count($left) > 0 && count($right) > 0)
{
if($left[0] < $right[0])
{
$res[] = $right[0];
$right = array_slice($right , 1);
}
else
{
$res[] = $left[0];
$left = array_slice($left, 1);
}
}
while (count($left) > 0)
{
$res[] = $left[0];
$left = array_slice($left, 1);
}
while (count($right) > 0)
{
$res[] = $right[0];
$right = array_slice($right, 1);
}
return $res;
}
?>