
    In a healthcare system's patient record validation process, write a function that verifies if a given patient identifier number is one less than twice its reverse value, ensuring proper data integrity across multiple facilities. The function should help maintain consistent patient record assignments by detecting potentially problematic identifier patterns.
    

    
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):
    """
    In a healthcare system's patient record validation process, write a function that verifies if a given patient identifier number is one less than twice its reverse value, ensuring proper data integrity across multiple facilities. The function should help maintain consistent patient record assignments by detecting potentially problematic identifier patterns.
    

    """
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):
    """
    In a healthcare system's patient record validation process, write a function that verifies if a given patient identifier number is one less than twice its reverse value, ensuring proper data integrity across multiple facilities. The function should help maintain consistent patient record assignments by detecting potentially problematic identifier patterns.
    

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