Gửi bài giải
Điểm:
1,00 (OI)
Giới hạn thời gian:
1.0s
Giới hạn bộ nhớ:
256M
Input:
stdin
Output:
stdout
Nguồn bài:
Dạng bài
Ngôn ngữ cho phép
C, C++, Java, Kotlin, Pascal, PyPy, Python, Scratch
You are given a string containing just the characters (
, )
, {
, }
, [
and ]
. Your task is to determine if the input string is valid.
An input string is valid if:
- Open brackets must be closed by the same type of brackets.
- Open brackets must be closed in the correct order.
Input
An interger ~N~ ~(N ≤ 10)~ is the number of testcases
Each of the next ~N~ lines contains a string of only brackets ~S~ ~(0 ≤ |S| ≤ 10^4)~.
Output
true
if ~S~ is valid, otherwisefalse
.
Sample Input 1
1
{[]}
Sample Output 1
true
Sample Input 2
2
([)]
{[]}
Sample Output 2
false
true
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