text: A Utility that padds zeros in front of the Node , with the given diff
code: Node * paddZeros ( Node * sNode , int diff ) { if ( sNode == NULL ) return NULL ; Node * zHead = newNode ( 0 ) ; diff -- ; Node * temp = zHead ; while ( diff -- ) { temp -> next = newNode ( 0 ) ; temp = temp -> next ; } temp -> next = sNode ; return zHead ; }