```cpp
#include<bits/stdc++.h>
using namespace std;
int pd(char c){
if(c=='w'){
return 0;
}
if(c=='r'){
return 1;
}
if(c=='b'){
return 2;
}
}
int sl(string &s,int i,int d,int n){
int num=0,zt=0;
while(i>=0&&i<n*2){
zt=zt|pd(s[i]);
if(zt==3){
break;
}
num++;
i+=d;
}
return num;
}
int main(){
string s;
int n,big=0,zb,yb;
cin>>n>>s;
s+=s;
for(int i=0;i<n*2;i++){
zb=sl(s,i-1,-1,n);
yb=sl(s,i,1,n);
big=max(big,zb+yb);
}
cout<<min(big,n);
return 0;
}
```
by Chrome_Dino @ 2024-04-28 21:35:56
谢谢，已关
by 0xllllllllllf @ 2024-05-14 18:19:48