Rotate Array Right
PHP
Medium
4 views
Problem Description
Rotate an array to the right by k positions.
Input Format
Line1 n k. Line2 n integers.
Output Format
One line rotated.
Official Solution
<?php
$inputText=trim(stream_get_contents(STDIN));
if($inputText==='') exit;
$tokens=preg_split('/\\s+/', $inputText);
$i=0; $n=intval($tokens[$i++] ?? 0);
$k=intval($tokens[$i++] ?? 0);
$a=[];
for($t=0;$t<$n;$t++) $a[] = $tokens[$i++] ?? '0';
if($n===0){ echo ''; exit; }
$k = $k % $n;
$output=[];
for($t=$n-$k;$t<$n;$t++) $output[]=$a[$t];
for($t=0;$t<$n-$k;$t++) $output[]=$a[$t];
echo implode(' ',$output);
?>
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