Incorrect Answer in Broken Necklace Problem USACO [closed]

Answer 1

Here is my code:

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.PrintWriter;

/**
 *
 * @author Bansari
*/
public class beads {
    public static void main(String args[]){
    try{
        BufferedReader f = new BufferedReader(new FileReader("beads.in"));
                                                      // input file name goes above
        PrintWriter out = new PrintWriter(new BufferedWriter(new FileWriter("str.txt")));
        int len = Integer.parseInt(f.readLine());
        String s=f.readLine();
        int c1=0,c2=0;
        int breakpoint=0;
        int max = 0;

        for(int i = 1;i<=len;i++){

            char before = s.charAt((i-1)%len);
            char after = s.charAt(i%len);

            if(before != after){
                c1=0;
                c2=0;
                int index = i-1;
                while(s.charAt(index)==before || s.charAt(index)=='w'){
                    char sc = s.charAt(index);
                    c1++;
                    if(index==0)
                        index = len-1;
                    else
                        index--;
                }
                index = i;
                while(s.charAt(index%len)==after || s.charAt(index%len)=='w'){
                    c2++;  
                    if(index == len-1)
                        index = 0;
                    else
                        index++;
                }
                if(max < (c1 + c2)){
                    breakpoint=i;
                    max = c1+c2;
                }
            }
        }
        out.println(max);
        out.close();
        System.exit(0);
        }catch(Exception e){

        }
    }
}