DSA · Theory

Sorted insert for circular linked list

Theory

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Sorted insert for circular linked list

If you can teach Sorted insert for circular linked list using a ticket queue node, you know it. If you only know the heading, you don’t.

Sorted insert for circular linked list on the board: head → next → …. Then say what a ticket queue node looks like after.

Skip Sorted insert for circular linked list and losing the next pointer on delete shows up in a counter.

Sorted insert for circular linked list shows up in a counter. Name a ticket queue node, not “a real-world scenario”.

If a ticket queue node breaks under Sorted insert for circular linked list, check losing the next pointer on delete first.

After Sorted insert for circular linked list, Ananya should still remember losing the next pointer on delete.

Close Sorted insert for circular linked list with: “If I skip it, a ticket queue node goes wrong like this: losing the next pointer on delete.”

Diagram

  [10] → [20] → [30] → /
   head              tail

Exam tip

Say Sorted insert for circular linked list in one breath, then head → next → …, then losing the next pointer on delete.

Example

class Node:
    def __init__(self, val, next=None):
        self.val = val
        self.next = next

head = Node(1, Node(2, Node(3)))
cur = head
while cur:
    print(cur.val, end=" -> " if cur.next else "\n")
    cur = cur.next

Sorted insert for circular linked list — a linked list chains nodes with next pointers instead of contiguous indexes.

Short notes

DefSorted insert for circular linked list — Ananya uses it for a ticket queue node in a counter.
RuleSorted insert for circular linked list → head → next → ….
RememberSorted insert for circular linked list + a dry-run table (a counter).
UseSorted insert for circular linked list in a counter (a ticket queue node).
TrapSorted insert for circular linked list — losing the next pointer on delete.
ExSorted insert for circular linked list → a ticket queue node.

class Node: def __init__(self, val, next=None): self.val = val self.next = next head = Node(1, Node(2, Node(3))) cur = head while cur: print(cur.val, end=" -> " if cur.next else "\n") cur = cur.next

Sorted insert for circular linked list

Example

Short notes

Questions

Sorted insert for circular linked list

Example

Short notes

Questions