
    Write a function to validate a patient identification number by checking if it is one less than twice its reversed value, which is crucial for preventing duplicate records and ensuring accurate appointment scheduling in the healthcare system. The validation system must compare the original ID number with twice its reversed digits minus one to maintain data integrity.
    

    
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 identification number by checking if it is one less than twice its reversed value, which is crucial for preventing duplicate records and ensuring accurate appointment scheduling in the healthcare system. The validation system must compare the original ID number with twice its reversed digits minus one to maintain data integrity.
    

    """
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 identification number by checking if it is one less than twice its reversed value, which is crucial for preventing duplicate records and ensuring accurate appointment scheduling in the healthcare system. The validation system must compare the original ID number with twice its reversed digits minus one to maintain data integrity.
    

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