제출 #120127

실행 실패 (제출 코드 컴파일 에러)

Main.java:12: error: cannot find symbol
        back++;
        ^
  symbol:   variable back
  location: class Main
Main.java:16: error: incompatible types: int cannot be converted to boolean
        if(empty()){
                ^
Main.java:23: error: cannot find symbol
        return queue.length();
                    ^
  symbol:   method length()
  location: variable queue of type int[]
Main.java:35: error: incompatible types: int cannot be converted to boolean
        if(empty()){
                ^
Main.java:42: error: incompatible types: int cannot be converted to boolean
        if(empty()){
                ^
Main.java:59: error: variable st is already defined in method main(String[])
            StringTokenizer st = new StringTokenizer(commandLine);
                            ^
6 errors