class Acc {
 String accNo; //계좌번호
 String ownName; //예금주 이름
 int bal; //잔액
 Acc(String accNo, String ownName, int bal){
 this.accNo=accNo;
 this.ownName=ownName;
 this.bal=bal;
 }
 void deposit(int amnt) {
 bal+=amnt;
 }

 int withdraw(int amnt) throws Exception{
 if(bal<amnt)
 throw new Exception("잔액이 부족합니다.");
 bal -=amnt;
 return amnt;
 }
}

class MinusAcc extends Acc{
 int cred; // 마이너스 한도액
 MinusAcc(String accNo, String ownName, int bal) {
 super(accNo, ownName, bal);
 }
 @Override
 int withdraw(int amnt) throws Exception {
 if(bal+cred<amnt)
 throw new Exception("인출이 불가능합니다.");
 bal -=amnt;
 return amnt;
 }
}

public class accMain {
 public static void main(String args[]) throws Exception {
 MinusAcc obj = new MinusAcc();
 obj.accNo = "000-11";
 obj.ownName = "김선달";
 obj.bal = 10;
 obj.cred = 5000;
 obj.withdraw(50);
 try {
 System.out.println("인출액:");
 System.out.println("잔액:"+obj.bal);
 System.out.println("마이너스 한도액:"+obj.cred);

 } catch (Exception e){
 System.out.println(e.getMessage());
 }
 }
}