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DSA · Theory

Total Distance Travelled

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Theory

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Total Distance Travelled

Total Distance Travelled is a DSA idea you prove with Total Distance Travelled on Kabir's board, not with a slogan.

Total Distance Travelled order: meaning → one Total Distance Travelled step Kabir can write from memory → one limit. Dumping ten features helps nobody.

Skip Total Distance Travelled and skipping the failure case for Total Distance Travelled shows up in a campus project.

Use Total Distance Travelled when Total Distance Travelled on Kabir's board must stay clear. If a simpler DSA step works, use that instead.

Total Distance Travelled trap: skipping the failure case for Total Distance Travelled. Kabir loses marks for that every viva.

After Total Distance Travelled, Kabir should still remember skipping the failure case for Total Distance Travelled.

Close Total Distance Travelled with: “If I skip it, Total Distance Travelled on Kabir's board goes wrong like this: skipping the failure case for Total Distance Travelled.”

Exam tip

Say Total Distance Travelled in one breath, then one Total Distance Travelled step Kabir can write from memory, then skipping the failure case for Total Distance Travelled.

Example

# Total Distance Travelled
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)

Total Distance Travelled: dry-run [4, 1, 3]. Say the list after one step.

Short notes

  • DefTotal Distance Travelled — Kabir uses it for Total Distance Travelled on Kabir's board in a campus project.
  • RuleTotal Distance Travelled → one Total Distance Travelled step Kabir can write from memory.
  • RememberTotal Distance Travelled + Big-O (a campus project).
  • UseTotal Distance Travelled in a campus project (Total Distance Travelled on Kabir's board).
  • TrapTotal Distance Travelled — skipping the failure case for Total Distance Travelled.
  • ExTotal Distance Travelled → Total Distance Travelled on Kabir's board.

Questions

1

In one breath: what does Total Distance Travelled do for Kabir?

2

Where does Total Distance Travelled show up in a campus project?

3

Viva: one wrong answer people give for Total Distance Travelled.

4

Change one input on Total Distance Travelled on Kabir's board. Predict the new result.

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