(SPOJ) 814 - Macaco-prego - Solução

import java.io.*;
import java.util.*;
import java.lang.Math;

class Main {
    public static void main(String[] args) throws NumberFormatException, IOException {
        Main processando = new Main();
        processando.processa();
       
        System.exit(0);
    }
   
    void processa() throws NumberFormatException, IOException {
        String line = "";
       
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

        int contador = 0;
        while ((line = br.readLine()) != null) {
            StringTokenizer tokenizer = new StringTokenizer(line);
            int numLinhas = Integer.valueOf(tokenizer.nextToken());
           
            if (numLinhas == 0) {
                return;
            }
           
            contador++;
            System.out.println("Teste " + contador);
           
            int[] coord1 = new int[4];
            int[] coord2 = new int[4];
           
            boolean nenhum = false;       
           
            line = br.readLine();    
            tokenizer = new StringTokenizer(line);
            for (int i = 0; i < 4; i++) {
                coord1[i] = Integer.valueOf(tokenizer.nextToken());
            }
           
            for (int j = 1; j < numLinhas; j++) {
                line = br.readLine();    
                tokenizer = new StringTokenizer(line);
                for (int i = 0; i < 4; i++) {
                    coord2[i] = Integer.valueOf(tokenizer.nextToken());
                }
               
                coord1[0] = Math.max(coord1[0], coord2[0]);
                coord1[2] = Math.min(coord1[2], coord2[2]);
                coord1[1] = Math.min(coord1[1], coord2[1]);
                coord1[3] = Math.max(coord1[3], coord2[3]);
               
                if (coord1[2] <= coord1[0] || coord1[3] >= coord1[1]) {
                    nenhum = true;
                }
            }
           
            if (nenhum == true) {
                System.out.println("nenhum");
            }
            else {
                System.out.println(coord1[0] + " " + coord1[1] + " " + coord1[2] + " " + coord1[3]);
            }
           
            System.out.println();
        }
                           
        return;
    }
}