using System;

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namespace UserNamespace {

    abstract class User {

        private string user_id;

        protected string user_password;

        public User(string id, string pass) {

            this.user_id = id;

            this.user_password = pass;

        }

        public bool verifyLogin(string id, string pass) {

            if (id.Equals(user_id) && pass.Equals(user_password)) {

                return true;

            } else {

                return false;

            }

        }

        public abstract void updatePassword(string newPassword);

    }

    class Administrator : User {

        private string admin_name;

        public Administrator(string name, string id, string pass) : base(id, pass) {

            this.admin_name = name;

        }

        public override void updatePassword(string newPassword) {

            this.user_password = newPassword;

        }

        public void updateAdminName(string name) {

            this.admin_name = name;

        }

    }

}

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