static Node r

Node he

$\{$

$/*$ if head is null then return$*/$

if $($head $==$ null$)$

return null;

head.next $=r$

$($head$.$next$)$

if $($head$.$next $!=$ null &&

head.next.data $==$ head.datal

$\{$

Node res $=$ head.next;

return res;

$\}$

return head;

$\}$