DSA · Theory

Two Pointers Technique

Theory

399/810

Two Pointers Technique

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

Smallest example: the smallest Two Pointers Technique example you can type. Type it, run it, and say what you see. If you can do that from memory, you know Two Pointers Technique.

From the example next to this theory — Two Pointers Technique: dry-run [4, 1, 3].

Trap — only saying “Two Pointers Technique” with no example. Fix that before you talk about advanced DSA.

Viva: what is Two Pointers Technique? Then show the smallest Two Pointers Technique example you can type. Then name the trap.

Exam tip

What is Two Pointers Technique? Show this: the smallest Two Pointers Technique example you can type. Trap: only saying “Two Pointers Technique” with no example.

Example

# Two Pointers Technique
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)

Two Pointers Technique: dry-run [4, 1, 3]. Say the list after one step.

Short notes

DefTwo Pointers Technique — a short Two Pointers Technique example in a short dry-run on paper.
Rulethe smallest Two Pointers Technique example you can type
Traponly saying “Two Pointers Technique” with no example
Usea short dry-run on paper

DSA · Theory

Two Pointers Technique

← All stacks

Theory

399/810

Two Pointers Technique

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

Smallest example: the smallest Two Pointers Technique example you can type. Type it, run it, and say what you see. If you can do that from memory, you know Two Pointers Technique.

From the example next to this theory — Two Pointers Technique: dry-run [4, 1, 3].

Trap — only saying “Two Pointers Technique” with no example. Fix that before you talk about advanced DSA.

Viva: what is Two Pointers Technique? Then show the smallest Two Pointers Technique example you can type. Then name the trap.

Exam tip

What is Two Pointers Technique? Show this: the smallest Two Pointers Technique example you can type. Trap: only saying “Two Pointers Technique” with no example.

Example

# Two Pointers Technique
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)

Two Pointers Technique: dry-run [4, 1, 3]. Say the list after one step.

Short notes

DefTwo Pointers Technique — a short Two Pointers Technique example in a short dry-run on paper.
Rulethe smallest Two Pointers Technique example you can type
Traponly saying “Two Pointers Technique” with no example
Usea short dry-run on paper

Two Pointers Technique

Example

Short notes

Questions

Two Pointers Technique

Example

Short notes

Questions