# 寫代碼
# 實現用戶輸入用戶名和密碼,當用戶名為seven且密碼為123時,顯示登錄成功,否則登錄失敗。
username = input("Please enter your username: ")
password = input("Please enter your password: ")
if username == "seven" and password == "123":
print("login successful.")
else:
print("login failed.")