제출 #181995

실행 실패 (제출 코드 컴파일 에러)

Main.java:19: error: unexpected type
        HashSet<char> useAlphabet = new Set<>();
                ^
  required: reference
  found:    char
Main.java:19: error: Set is abstract; cannot be instantiated
        HashSet<char> useAlphabet = new Set<>();
                                    ^
2 errors