How should I practice Generate Parentheses?

Start by reading the full statement, solve the visible examples, then compare the pattern against related Microsoft onsite interview problems in FastPrep.

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Problem · String

Generate Parentheses

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Problem statement

Given n pairs of parentheses, return every well-formed sequence that uses exactly those pairs.

Return the sequences in lexicographic order.

Function

generateParenthesis(n: int) → String[]

Examples

Example 1

n = 3return = ["((()))","(()())","(())()","()(())","()()()"]

These are all five balanced sequences containing three opening and three closing parentheses, in lexicographic order.

Constraints

1 <= n <= 6