/in/Main.java:10: error: cannot find symbol
        int[] e = Stream.of(in.nextLine().split(" "))
                  ^
  symbol:   variable Stream
  location: class Main
/in/Main.java:17: error: cannot find symbol
        Arrays.sort(nodes);
        ^
  symbol:   variable Arrays
  location: class Main
/in/Main.java:20: error: cannot find symbol
        Arrays.sort(nodes);
        ^
  symbol:   variable Arrays
  location: class Main
3 errors