#include <iostream>
#include <string>
using namespace std;

class Package {
public:
    string id;
    string status;

    Package(string i) : id(i), status("준비중") {}

    void update_status(string new_status) {
        status = new_status;
        if (status == "완료") {
            cout << "배송이 끝났습니다" << endl;
        }
    }
};

int main() {
    Package pkg("PKG-001");
    cout << pkg.status << endl; 
    pkg.update_status("배송중")
    cout << pkg.status << endl; 
    pkg.update_status("완료"); 
    cout << pkg.status << endl; 
    return 0;
}

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