Problem

9 /10


括号-2

Problem

打印所有长度为 N 的有效括号表达式，由圆括号和方括号组成。
 
输入
第一行包含一个数字N。 \(1 <= N <= 14\), N 是偶数。
 
输出
每个表达式单独显示一行。
 

 

例子
<头> <日># <正文>

time 1000 ms
memory 256 Mb
Rules for program design and list of errors in automatic problem checking

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输入 输出
1 2
()
[]
2 4
(())
[[]]
[()]
()[]
[]()
()()
([])
[][]