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Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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What is this code's trace, and what is this code's time complexity?
Input is: 2 4 6 5 2

Transcribed Image Text:public static ListCell<Integer> midNode (ListCell<Integer> head) {
if (head == null)
return head;
ListCell<Integer> slow = head, fast = head;
while (fast.next != null && fast.next.next != null) {
slow = slow.next;
fast = fast.next.next;
}
return slow;
public static ListCell<Integer> mergeSort(ListCell<Integer> head)
{
if(head == null || head.next == null)
return head;
ListCell<Integer> middle = midNode (head);
ListCell<Integer> next0fTheMiddle = middle.next;
middle.next = null;
ListCell<Integer> left = mergeSort(head);
ListCell<Integer> right = mergeSort (next0fTheMiddle);
ListCell<Integer> sortedList = sortedMerge (left, right);
return sortedList;

Transcribed Image Text:}
static ListCell<Integer> sortedMerge (ListCell<Integer> 1, ListCell<Integer> r)
{
ListCell<Integer> result = null;
if (l == null)
return r;
if (r == null)
return l;
if (1.datum <= r.datum) {
result = l;
result.next = sortedMerge (l.next, r);
}
else {
result = r;
result.next = sortedMerge (1, r.next);
}
return result;
}
// Complete the mergeSort function below.
// !!! Leave the code as is except for the below function, !!!
// !!! though writing helper function(s) are allowed. !!!
private static void sort(Solution.LinkedList<Integer> llist) {
llist.head = mergeSort(llist.head);
Expert Solution
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