count = 0
if count == 3：
    print(‘您的賬戶已凍結，請聯系客服解凍‘)
else：
    while count < 3:
        user = input(‘‘)
        pwd = input(‘‘)
        if user == ‘alex‘ and pwd == ‘123‘
            print(‘歡迎光臨‘)
            break
        else:
            print(‘用戶名或者密碼錯誤‘)
        count = count + 1

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