
    Write a function to determine if a patient's risk classification number follows a specific pattern where it equals one less than double its reverse, as this relationship is used in the hospital's readmission prediction model to categorize patient risk levels. The function should analyze the patient identifier and validate if it meets this mathematical relationship to properly classify patients into appropriate risk categories.
    

    
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 determine if a patient's risk classification number follows a specific pattern where it equals one less than double its reverse, as this relationship is used in the hospital's readmission prediction model to categorize patient risk levels. The function should analyze the patient identifier and validate if it meets this mathematical relationship to properly classify patients into appropriate risk categories.
    

    """
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 determine if a patient's risk classification number follows a specific pattern where it equals one less than double its reverse, as this relationship is used in the hospital's readmission prediction model to categorize patient risk levels. The function should analyze the patient identifier and validate if it meets this mathematical relationship to properly classify patients into appropriate risk categories.
    

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