Practice stack reasoning and edge-case communication in a short shared session. Agree on the stack invariant and test the smallest failing strings together.
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Practice stack reasoning and edge-case communication in a short shared session.
Jam plan
Agree on the stack invariant and test the smallest failing strings together.
Problem statement
Given a string containing only parentheses, brackets, and braces, determine whether every opening character is closed by the same type in the correct order.
Constraints
Examples
Input: s = "()[]{}"
Output: true
Input: s = "(]"
Output: false
A closing bracket must match the most recent opening bracket.
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