def max_volume (s):
     
    maxvalue = 0
    i = 1
    for i in range(s - 1): 
        j = 1
        for j in range(s): 
            k = s - i - j 
            maxvalue = max(maxvalue, i * j * k)         
    return maxvalue 
def is_not_prime(n):
    import math
    
    result = False
    for i in range(2,int(math.sqrt(n)) + 1):
        if n % i == 0:
            result = True
    return result