代码
```cpp
#include<algorithm>
#include<cstdio>
#include<cstring>
using namespace std;
char a[100005];
int p,last,next[100005],n;
int main()
{
while(scanf("%s",a+1))
{
next[0]=0;
last=p=0;
n=strlen(a+1);
for(int i=1;i<=n;i++)
{
if(a[i]=='[')p=0;
else if(a[i]==']')p=last;
else
{
next[i]=next[p];
next[p]=i;
if(p==last)last=i;
p=i;
}
}
for(int i=next[0];i;i=next[i])printf("%c",a[i]);
printf("\n");
}
return 0;
}
```
by 逆流之时 @ 2019-03-04 17:57:41
把next改成nex
by SSerxhs @ 2019-03-04 17:58:39
next大概是关键字qwq
(好像index也是)
by 千华缭乱 @ 2019-03-04 18:02:04
这些关键字怎么判断？C++也没有加粗显示
by 逆流之时 @ 2019-03-04 18:06:30
@[逆流之时](/space/show?uid=144740) ~~在NOIPCE几次就知道了~~
by 千华缭乱 @ 2019-03-04 18:12:46
@[逆流之时](/space/show?uid=144740)
用vscode
by LJB00131 @ 2019-03-04 18:24:39
@[千华缭乱](/space/show?uid=67445) NOIP2018用了index而丢掉100分的我...
by Meatherm @ 2019-03-04 18:27:44
@[逆流之时](/space/show?uid=144740) 如果您不用
```cpp
using namespace std;
```
也不会出现编译错误 QwQ
by 龙之吻—水货 @ 2019-03-04 18:57:55
@[兹磁洛谷](/space/show?uid=108949) ~~我过于菜而丢了1=~~
by 千华缭乱 @ 2019-03-05 14:23:37