/*ID: zizz-ziLANG: CTASK: beads*/#include <stdio.h>int main(void){FILE *fin,*fout;fin=fopen("beads.in","r");fout=fopen("beads.out","w");int n,i,j,t,now=1,max=1,temp=0,begin=0,w=0;char s[700],flag;fscanf(fin,"%d",&n);fscanf(fin,"%s",&s);i=0;while(s[i]=='w'){w++;i++;}if (w==0) flag=s[i];elseif(w==n){max=n;fprintf(fout,"%d\n",max);fclose(fin);fclose(fout);return 0;}else{begin+=w;now+=w;flag=s[w];}for(i=n;i<2*n;i++)s[i]=s[i-n];for(i=begin+1;i<2*n;i++){if(s[i]==flag){now++;w=0;if(temp+now>max) max=temp+now;}elseif(s[i]=='w'){w++;now++;if(temp+now>max) max=temp+now;}else{flag=s[i];temp=now-w;now=w+1;w=0;}}if(max>n) max=n;fprintf(fout,"%d\n",max);fclose(fin);fclose(fout);return 0;}
