你这个万一是 ）（）（@ 排列肯定错
by miaojiexi @ 2018-04-10 21:21:42
@[dashu1980](/space/show?uid=71523)
```
#include<bits/stdc++.h>
using namespace std;
int b,c;
char a[1<<8];
int main()
{
scanf("%s",a);c=strlen(a);
for(int i=0;i^c;i=-~i)
{
if(a[i]=='(') b=-~b;
if(a[i]==')') b=~-b;
if(b<0) {puts("NO");return 0;}
}
if(b==0) puts("YES");
else puts("NO");
}
```
by da32s1da @ 2018-04-10 21:43:47