DSA · Theory

a)LL Rotation

Theory

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If you can teach a)LL Rotation using a aLL Rotation dry-run, you know it. If you only know the heading, you don’t.

a)LL Rotation on the board: one aLL Rotation step Ananya can write from memory. Then say what a aLL Rotation dry-run looks like after.

a)LL Rotation exists so Ananya can keep a aLL Rotation dry-run correct in a campus project.

Use a)LL Rotation when a aLL Rotation dry-run must stay clear. If a simpler DSA step works, use that instead.

a)LL Rotation miss — skipping the failure case for aLL Rotation. Fix it before you talk about advanced DSA.

After a)LL Rotation, Ananya should still remember skipping the failure case for aLL Rotation.

One breath for a)LL Rotation, then a aLL Rotation dry-run, then skipping the failure case for aLL Rotation. Sit down.

Exam tip

For a)LL Rotation: definition + a campus project + one failure.

# a)LL Rotation
data = [4, 1, 3]
print("start", data)
if data[0] > data[1]:
    data[0], data[1] = data[1], data[0]
print("after one step", data)

a)LL Rotation: dry-run [4, 1, 3]. Say the list after one step.

Defa)LL Rotation — Ananya uses it for a aLL Rotation dry-run in a campus project.
Rulea)LL Rotation → one aLL Rotation step Ananya can write from memory.
Remembera)LL Rotation + time vs memory (a campus project).
Usea)LL Rotation in a campus project (a aLL Rotation dry-run).
Trapa)LL Rotation — skipping the failure case for aLL Rotation.
Exa)LL Rotation → a aLL Rotation dry-run.