```
#include <bits/stdc++.h>
using namespace std;
int n,ans=0;
char a[10005];
int main()
{
cin>>n;
for(int i=1;i<=n;i++)
{
cin>>a[i];
}
for(int i=1;i<=n;i++)
{
a[i+n]=a[i];
a[i+2*n]=a[i];
}
for(int i=1;i<=2*n;i++)
{
int s=0;
char x=a[i-1];
for(int j=i-1;j>=1;j--)
{
if(x==a[j] || a[j]=='w')
{
s++;
}
else if(x=='w')
{
x=a[j];
s++;
}
else
{
break;
}
}
x=a[i];
for(int j=i;j<=2*n;j++)
{
if(x==a[j] || a[j]=='w')
{
s++;
}
else if(x=='w')
{
x=a[j],s++;
}
else
{
break;
}
}
ans=max(ans,s);
}
ans=min(ans,n);
cout<<ans<<"\n";
return 0;
}
```
by RicardoLu @ 2021-07-23 13:19:03