제출 #97963

실행 실패 (제출 코드 컴파일 에러)

Main.java:3: error: cannot find symbol
        Scanner scan = new Scanner(System.in);
        ^
  symbol:   class Scanner
  location: class Main
Main.java:3: error: cannot find symbol
        Scanner scan = new Scanner(System.in);
                           ^
  symbol:   class Scanner
  location: class Main
Main.java:4: error: cannot find symbol
        Map<Integer, List<Integer>> computer = new HashMap<>();
        ^
  symbol:   class Map
  location: class Main
Main.java:4: error: cannot find symbol
        Map<Integer, List<Integer>> computer = new HashMap<>();
                     ^
  symbol:   class List
  location: class Main
Main.java:4: error: cannot find symbol
        Map<Integer, List<Integer>> computer = new HashMap<>();
                                                   ^
  symbol:   class HashMap
  location: class Main
Main.java:8: error: cannot find symbol
            List<Integer> a = new ArrayList<>();
            ^
  symbol:   class List
  location: class Main
Main.java:8: error: cannot find symbol
            List<Integer> a = new ArrayList<>();
                                  ^
  symbol:   class ArrayList
  location: class Main
Main.java:18: error: cannot find symbol
        Set<Integer> visited = new HashSet<>();
        ^
  symbol:   class Set
  location: class Main
Main.java:18: error: cannot find symbol
        Set<Integer> visited = new HashSet<>();
                                   ^
  symbol:   class HashSet
  location: class Main
Main.java:19: error: cannot find symbol
        Stack<Integer> whereFrom = new Stack<>();
        ^
  symbol:   class Stack
  location: class Main
Main.java:19: error: cannot find symbol
        Stack<Integer> whereFrom = new Stack<>();
                                       ^
  symbol:   class Stack
  location: class Main
11 errors