
    Write a function to validate patient identification numbers by checking if the given ID number is one less than twice its reverse, as this pattern helps detect potential data entry errors in the electronic health record system. For example, if a patient ID is 123, the function should check if 123 is one less than twice the reverse (321).
    

    
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 patient identification numbers by checking if the given ID number is one less than twice its reverse, as this pattern helps detect potential data entry errors in the electronic health record system. For example, if a patient ID is 123, the function should check if 123 is one less than twice the reverse (321).
    

    """
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 patient identification numbers by checking if the given ID number is one less than twice its reverse, as this pattern helps detect potential data entry errors in the electronic health record system. For example, if a patient ID is 123, the function should check if 123 is one less than twice the reverse (321).
    

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