UVA - 496 - Simply Subsets

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.StringTokenizer;

public class Main {

    public static void main(String[] args) throws IOException {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        StringBuffer sb = new StringBuffer("");

        String m = "";
        ArrayList<Integer> arr1, arr2;
        while ((m = br.readLine()) != null) {
            arr1 = new ArrayList<Integer>();
            StringTokenizer st = new StringTokenizer(m);
            int n = st.countTokens();
            for (int i = 0; i < n; i++) {
                arr1.add(Integer.parseInt(st.nextToken()));
            }
            arr2 = new ArrayList<Integer>();
            st = new StringTokenizer(br.readLine());
            n = st.countTokens();
            for (int i = 0; i < n; i++) {
                arr2.add(Integer.parseInt(st.nextToken()));
            }
            if (arr1.size() < arr2.size()) {
                int count = 0;
                for (int i = 0; i < arr1.size(); i++) {
                    if (arr2.contains(arr1.get(i))) {
                        count++;
                    }
                }
                if (count == arr1.size()) {
                    sb.append("A is a proper subset of B\n");
                } else if (count == 0) {
                    sb.append("A and B are disjoint\n");
                } else {
                    sb.append("I'm confused!\n");
                }
            } else if (arr1.size() > arr2.size()) {
                int count = 0;
                for (int i = 0; i < arr2.size(); i++) {
                    if (arr1.contains(arr2.get(i))) {
                        count++;
                    }
                }
                if (count == arr2.size()) {
                    sb.append("B is a proper subset of A\n");
                } else if (count == 0) {
                    sb.append("A and B are disjoint\n");
                } else {
                    sb.append("I'm confused!\n");
                }
            } else {
                int count = 0;
                for (int i = 0; i < arr2.size(); i++) {
                    if (arr1.contains(arr2.get(i))) {
                        count++;
                    }
                }
                if (count == arr2.size()) {
                    sb.append("A equals B\n");
                } else if (count == 0) {
                    sb.append("A and B are disjoint\n");
                } else {
                    sb.append("I'm confused!\n");
                }
            }
        }
        System.out.print(sb);
    }
}