
    Write a function that determines if a patient's current vital sign reading is one unit less than twice its reverse reading, which could indicate a critical pattern in their health status. For example, if a patient's heart rate is 123, the function should check if 123 is one less than twice the reverse (321), as this specific mathematical relationship has been identified as a potential indicator for rapid health deterioration.
    

    
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 that determines if a patient's current vital sign reading is one unit less than twice its reverse reading, which could indicate a critical pattern in their health status. For example, if a patient's heart rate is 123, the function should check if 123 is one less than twice the reverse (321), as this specific mathematical relationship has been identified as a potential indicator for rapid health deterioration.
    

    """
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 that determines if a patient's current vital sign reading is one unit less than twice its reverse reading, which could indicate a critical pattern in their health status. For example, if a patient's heart rate is 123, the function should check if 123 is one less than twice the reverse (321), as this specific mathematical relationship has been identified as a potential indicator for rapid health deterioration.
    

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