parseInput.java

 public void parse(String filename) {
        int bufferSize = 8 * 1024;
        slices = new ArrayList<>();
        BufferedReader bufferedReader = null;
        try {
            bufferedReader = new BufferedReader(new FileReader(filename), bufferSize);
            String line = bufferedReader.readLine();
            String[] request = line.split(" ");
            maxPizzas = Integer.parseInt(request[0]);
            int pizzas = Integer.parseInt(request[1]);

            line = bufferedReader.readLine();
            String[] secondLine = line.split(" ");

            for (int p = 0; p < pizzas; p++) {
                int slice = Integer.parseInt(secondLine[p]);
                slices.add(slice);
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }