import sys
 
data = sys.stdin.read().strip()
 
if not data:
    # 沒輸入時的預設處理
    print("系統狀態：目前有 0 筆掛單等待中")
else:
    choice = data
 
    if choice == "1":
        print("您選擇的是 A 組")
    elif choice == "2":
        print("您選擇的是 B 組")
    elif choice == "3":
        print("您選擇的是 C 組")
    else:
        print("輸入錯誤")
 
    print("系統狀態：目前有 0 筆掛單等待中")

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