#2 most askedVery commonEasyStack

Valid Parentheses

🏢 Asked in real interviews

No reports yet. Were you asked this? Be the first to say where.

Given a string of brackets ()[]{}, return True if every opening bracket is closed by the same type, in the right order.

"([]{})" → True, "(]" → False, "((" → False.

🧪 Practice

Write your solution, then press Run tests. Explain your approach out loud as you go.

def is_valid(s):
    pass

Output appears here. Press Run or Ctrl/⌘ + Enter.

Try it first. Struggling for a few minutes is how it sticks.