UVA - 10324 - Zeros and Ones

 
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class Main {

    public static void main(String[] args) throws IOException {
        InputStreamReader isr = new InputStreamReader(System.in);
        BufferedReader br = new BufferedReader(isr);
        StringBuilder sb = new StringBuilder("");
        String m = "";
        int cases = 1;
        while ((m = br.readLine()) != null) {
            sb.append("Case ").append(cases).append(":\n");

            int n = Integer.parseInt(br.readLine());
            for (int i = 0; i < n; i++) {
                String[] str = br.readLine().split(" ");
                int x = Integer.parseInt(str[0]);
                int y = Integer.parseInt(str[1]);
                Boolean flag = false;
                for (int j = Math.min(x, y); j < Math.max(x, y); j++) {
                    if (m.charAt(j) != m.charAt(j + 1)) {
                        flag = true;
                        break;
                    }
                }
                if (flag) {
                    sb.append("No\n");
                } else {
                    sb.append("Yes\n");
                }

            }
            cases++;
        }
        System.out.print(sb);
    }
}