BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        String lines = br.readLine();
        long[] a = new long[4];
        String[] strs = lines.trim().split("\\s+");
        Arrays.fill(w, -1);
        for (int i = 0; i < strs.length; i++) {
            a[i] = Integer.parseInt(strs[i]);
        }