DSA · Theory

Two Pointer Technique

Theory

619/810

Two Pointer Technique

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

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

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

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

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

Exam tip

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

Example

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

Short notes

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

DSA · Theory

Two Pointer Technique

← All stacks

Theory

619/810

Two Pointer Technique

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

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

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

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

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

Exam tip

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

Example

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

Short notes

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

Two Pointer Technique

Example

Short notes

Questions

Two Pointer Technique

Example

Short notes

Questions