
    Write a function to validate a patient's monitoring device ID by checking if the ID number is one less than twice its reverse, ensuring data integrity in real-time vital sign tracking systems. For example, if a patient's device ID is 1089, the system should verify if 1089 is one less than twice its reverse (9801).
    

    
def rev(num):
    rev_num = 0
    while num > 0:
        rev_num = rev_num * 10 + num % 10
        num = num // 10
    return rev_num

def check(n):
    """
    Write a function to validate a patient's monitoring device ID by checking if the ID number is one less than twice its reverse, ensuring data integrity in real-time vital sign tracking systems. For example, if a patient's device ID is 1089, the system should verify if 1089 is one less than twice its reverse (9801).
    

    """
def rev(num):
    rev_num = 0
    while num > 0:
        rev_num = rev_num * 10 + num % 10
        num = num // 10
    return rev_num

def check(n):
    """
    Write a function to validate a patient's monitoring device ID by checking if the ID number is one less than twice its reverse, ensuring data integrity in real-time vital sign tracking systems. For example, if a patient's device ID is 1089, the system should verify if 1089 is one less than twice its reverse (9801).
    

    """
    return 2 * rev(n) == n + 1