
    Write a function to verify if a patient's risk assessment identifier number is one less than twice its reverse, as this mathematical relationship is used to validate legitimate category codes in the hospital's readmission risk classification system. The function should help maintain data integrity by ensuring only valid identifier numbers are processed in the patient tracking system.
    

    
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 verify if a patient's risk assessment identifier number is one less than twice its reverse, as this mathematical relationship is used to validate legitimate category codes in the hospital's readmission risk classification system. The function should help maintain data integrity by ensuring only valid identifier numbers are processed in the patient tracking system.
    

    """
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 verify if a patient's risk assessment identifier number is one less than twice its reverse, as this mathematical relationship is used to validate legitimate category codes in the hospital's readmission risk classification system. The function should help maintain data integrity by ensuring only valid identifier numbers are processed in the patient tracking system.
    

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