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DSA · Theory

MO's Algorithm

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Theory

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MO's Algorithm

If you can teach MO's Algorithm using MO's Algorithm on Asha's board, you know it. If you only know the heading, you don’t.

MO's Algorithm on the board: one MO's Algorithm step Asha can write from memory. Then say what MO's Algorithm on Asha's board looks like after.

MO's Algorithm exists so Asha can keep MO's Algorithm on Asha's board correct in a campus project.

MO's Algorithm shows up in a campus project. Name MO's Algorithm on Asha's board, not “a real-world scenario”.

MO's Algorithm miss — copy-pasting MO's Algorithm without a dry-run. Fix it before you talk about advanced DSA.

After MO's Algorithm, Asha should still remember copy-pasting MO's Algorithm without a dry-run.

Viva for MO's Algorithm: what it is → one MO's Algorithm step Asha can write from memory → the mistake (copy-pasting MO's Algorithm without a dry-run).

Exam tip

Board: MO's Algorithm on Asha's board. Dry-run MO's Algorithm. Name the trap: copy-pasting MO's Algorithm without a dry-run.

Example

# MO's Algorithm
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)

MO's Algorithm: dry-run [4, 1, 3]. Say the list after one step.

Short notes

  • DefMO's Algorithm — Asha uses it for MO's Algorithm on Asha's board in a campus project.
  • RuleMO's Algorithm → one MO's Algorithm step Asha can write from memory.
  • RememberMO's Algorithm + Big-O (a campus project).
  • UseMO's Algorithm in a campus project (MO's Algorithm on Asha's board).
  • TrapMO's Algorithm — copy-pasting MO's Algorithm without a dry-run.
  • ExMO's Algorithm → MO's Algorithm on Asha's board.

Questions

1

What is MO's Algorithm? Teach it with MO's Algorithm on Asha's board.

2

Where does MO's Algorithm show up in a campus project?

3

What trap does Asha hit with MO's Algorithm?

4

Dry-run one MO's Algorithm step Asha can write from memory and say the result.

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