DSA · Theory

Reverse Pairs Problem

Theory

669/810

Reverse Pairs Problem

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

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

From the example next to this theory — Reverse Pairs Problem: dry-run [4, 1, 3].

Trap — only saying “Reverse Pairs Problem” with no example. Fix that before you talk about advanced DSA.

Viva: what is Reverse Pairs Problem? Then show the smallest Reverse Pairs Problem example you can type. Then name the trap.

Exam tip

What is Reverse Pairs Problem? Show this: the smallest Reverse Pairs Problem example you can type. Trap: only saying “Reverse Pairs Problem” with no example.

Example

# Reverse Pairs Problem
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 Pairs Problem: dry-run [4, 1, 3]. Say the list after one step.

Short notes

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

DSA · Theory

Reverse Pairs Problem

← All stacks

Theory

669/810

Reverse Pairs Problem

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

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

From the example next to this theory — Reverse Pairs Problem: dry-run [4, 1, 3].

Trap — only saying “Reverse Pairs Problem” with no example. Fix that before you talk about advanced DSA.

Viva: what is Reverse Pairs Problem? Then show the smallest Reverse Pairs Problem example you can type. Then name the trap.

Exam tip

What is Reverse Pairs Problem? Show this: the smallest Reverse Pairs Problem example you can type. Trap: only saying “Reverse Pairs Problem” with no example.

Example

# Reverse Pairs Problem
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 Pairs Problem: dry-run [4, 1, 3]. Say the list after one step.

Short notes

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

Reverse Pairs Problem

Example

Short notes

Questions

Reverse Pairs Problem

Example

Short notes

Questions