Number of ways to traverse an N-arr

Number of ways to traverse an N-arr is a DSA topic. In plain words you use it for a short Number of ways to traverse an N-arr example in a short dry-run on paper. Don’t start with a slogan — start with that picture.

Smallest example: the smallest Number of ways to traverse an N-arr example you can type. Type it, run it, and say what you see. If you can do that from memory, you know Number of ways to traverse an N-arr.

From the example next to this theory — Number of ways to traverse an N-arr: dry-run [4, 1, 3].

Trap — only saying “Number of ways to traverse an N-arr” with no example. Fix that before you talk about advanced DSA.

Viva: what is Number of ways to traverse an N-arr? Then show the smallest Number of ways to traverse an N-arr example you can type. Then name the trap.

Exam tip

What is Number of ways to traverse an N-arr? Show this: the smallest Number of ways to traverse an N-arr example you can type. Trap: only saying “Number of ways to traverse an N-arr” with no example.

Example

# Number of ways to traverse an N-arr
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)

Number of ways to traverse an N-arr: dry-run [4, 1, 3]. Say the list after one step.

Short notes

DefNumber of ways to traverse an N-arr — a short Number of ways to traverse an N-arr example in a short dry-run on paper.
Rulethe smallest Number of ways to traverse an N-arr example you can type
Traponly saying “Number of ways to traverse an N-arr” with no example
Usea short dry-run on paper

Number of ways to traverse an N-arr

From the example next to this theory — Number of ways to traverse an N-arr: dry-run [4, 1, 3].

Trap — only saying “Number of ways to traverse an N-arr” with no example. Fix that before you talk about advanced DSA.

Viva: what is Number of ways to traverse an N-arr? Then show the smallest Number of ways to traverse an N-arr example you can type. Then name the trap.

Exam tip

Example

# Number of ways to traverse an N-arr
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)

Number of ways to traverse an N-arr: dry-run [4, 1, 3]. Say the list after one step.

Short notes

DefNumber of ways to traverse an N-arr — a short Number of ways to traverse an N-arr example in a short dry-run on paper.
Rulethe smallest Number of ways to traverse an N-arr example you can type
Traponly saying “Number of ways to traverse an N-arr” with no example
Usea short dry-run on paper

Number of ways to traverse an N-arr

Example

Short notes

Questions

Number of ways to traverse an N-arr

Example

Short notes

Questions