class wezz:
    def __init__(self , a , b, c):
        self.a = abs( int(a) )
        self.b = abs( int(b) )
        self.c = abs( int(c) )

    def somme(self):
        return self.a**2 + self.b**2 + self.c**2

    def div(self):
        L = [ ]
        for n in range(1 , self.somme()+1):
            if self.somme() % n == 0:
                L.append(n)
        return L

    def fct(self , *args):
        if len( args ) == 0:
            a = self.a
            b = self.b
            c = self.c
        else:
            a = args[0]
            b = args[1]
            c = args[2]
            
        if min(a,b,c) == 0:
            return 0
        else:
            return a * b * c + self.fct(a-1,b-1,c-1)