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DSA · Theory

Patricia Trie

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Theory

790/810

Patricia Trie

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

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

From the example next to this theory — Patricia Trie: dry-run [4, 1, 3].

Trap — only saying “Patricia Trie” with no example. Fix that before you talk about advanced DSA.

Viva — what is Patricia Trie? Then show the smallest Patricia Trie example you can type. Then name the trap.

Exam tip

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

Example

# Patricia Trie
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)

Patricia Trie: dry-run [4, 1, 3]. Say the list after one step.

Short notes

  • DefPatricia Trie — a short Patricia Trie example in a short dry-run on paper.
  • Rulethe smallest Patricia Trie example you can type
  • Traponly saying “Patricia Trie” with no example
  • Usea short dry-run on paper

Questions

1

What is Patricia Trie?

2

Give one small example of Patricia Trie.

3

What mistake do beginners make with Patricia Trie?

4

Where do you use Patricia Trie?

790 / 810

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