UVA - 10703 - Free spots

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

public class Main {

    public static void main(String[] args) throws IOException {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        StringBuilder sb = new StringBuilder();
        while (true) {
            StringTokenizer st = new StringTokenizer(br.readLine());
            int x = Integer.parseInt(st.nextToken());
            int y = Integer.parseInt(st.nextToken());
            int qu = Integer.parseInt(st.nextToken());
            if (x == 0 && y == 0 && qu == 0) {
                break;
            }
            boolean arr[][] = new boolean[x + 1][y + 1];
            for (int c = 0; c < qu; c++) {
                st = new StringTokenizer(br.readLine());
                int x1 = Integer.parseInt(st.nextToken());
                int y1 = Integer.parseInt(st.nextToken());
                int x2 = Integer.parseInt(st.nextToken());
                int y2 = Integer.parseInt(st.nextToken());
                for (int i = Math.min(x1, x2); i < Math.max(x1, x2) + 1; i++) {
                    for (int j = Math.min(y1, y2); j < Math.max(y1, y2) + 1; j++) {
                        arr[i][j] = true;
                    }
                }
            }
            int counter = 0;
            for (int i = 1; i < x + 1; i++) {
                for (int j = 1; j < y + 1; j++) {
                    if (!arr[i][j]) {
                        counter++;
                    }
                }
            }if(counter==0){
                sb.append("There is no empty spots.\n");
            }else if(counter==1){
                sb.append("There is one empty spot.\n");
            }else{
                sb.append("There are ").append(counter).append(" empty spots.\n");
            }
            br.readLine();
        }
        System.out.print(sb);
    }
}