DSA · Theory

Reverse a Number using Stacks

Theory

639/810

Reverse a Number using Stacks

Reverse a Number using Stacks is a DSA topic. In plain words you use it for a short Reverse a Number using Stacks example in a short dry-run on paper. Don’t start with a slogan — start with that picture.

Smallest example: the smallest Reverse a Number using Stacks example you can type. Type it, run it, and say what you see. If you can do that from memory, you know Reverse a Number using Stacks.

From the example next to this theory — Reverse a Number using Stacks: dry-run [4, 1, 3].

Trap — only saying “Reverse a Number using Stacks” with no example. Fix that before you talk about advanced DSA.

Viva: what is Reverse a Number using Stacks? Then show the smallest Reverse a Number using Stacks example you can type. Then name the trap.

Exam tip

What is Reverse a Number using Stacks? Show this: the smallest Reverse a Number using Stacks example you can type. Trap: only saying “Reverse a Number using Stacks” with no example.

Example

# Reverse a Number using Stacks
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)

Reverse a Number using Stacks: dry-run [4, 1, 3]. Say the list after one step.

Short notes

DefReverse a Number using Stacks — a short Reverse a Number using Stacks example in a short dry-run on paper.
Rulethe smallest Reverse a Number using Stacks example you can type
Traponly saying “Reverse a Number using Stacks” with no example
Usea short dry-run on paper

DSA · Theory

Reverse a Number using Stacks

← All stacks

Theory

639/810

Reverse a Number using Stacks

Smallest example: the smallest Reverse a Number using Stacks example you can type. Type it, run it, and say what you see. If you can do that from memory, you know Reverse a Number using Stacks.

From the example next to this theory — Reverse a Number using Stacks: dry-run [4, 1, 3].

Trap — only saying “Reverse a Number using Stacks” with no example. Fix that before you talk about advanced DSA.

Viva: what is Reverse a Number using Stacks? Then show the smallest Reverse a Number using Stacks example you can type. Then name the trap.

Exam tip

What is Reverse a Number using Stacks? Show this: the smallest Reverse a Number using Stacks example you can type. Trap: only saying “Reverse a Number using Stacks” with no example.

Example

# Reverse a Number using Stacks
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)

Reverse a Number using Stacks: dry-run [4, 1, 3]. Say the list after one step.

Short notes

DefReverse a Number using Stacks — a short Reverse a Number using Stacks example in a short dry-run on paper.
Rulethe smallest Reverse a Number using Stacks example you can type
Traponly saying “Reverse a Number using Stacks” with no example
Usea short dry-run on paper

Reverse a Number using Stacks

Example

Short notes

Questions

Reverse a Number using Stacks

Example

Short notes

Questions