
    Write a function to validate hospital patient IDs by checking if the ID number is one less than twice its reverse, ensuring proper patient identification in the specialized monitoring wing. For example, a valid patient ID of 47 should be one less than twice its reverse (74), making 47 a valid ID since it equals 2*74 - 1.
    

    
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 hospital patient IDs by checking if the ID number is one less than twice its reverse, ensuring proper patient identification in the specialized monitoring wing. For example, a valid patient ID of 47 should be one less than twice its reverse (74), making 47 a valid ID since it equals 2*74 - 1.
    

    """
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 hospital patient IDs by checking if the ID number is one less than twice its reverse, ensuring proper patient identification in the specialized monitoring wing. For example, a valid patient ID of 47 should be one less than twice its reverse (74), making 47 a valid ID since it equals 2*74 - 1.
    

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