← 返回 meta 的题目列表Valid Parentheses
类型：online_judge
Given a string s containing just the characters '(', ')', '{', '}', '[' and ']', determine if the input string is valid. An input string is valid if: 1. Open brackets must be closed by the same type of brackets. 2. Open brackets must be closed in the correct order. Example:
Input: "()[]{}"
Output: true
Example
Input
()[]{}