#分からない・・・ヾ(:3ﾉｼヾ)ﾉｼ

def abs(x);x<0 ? -x : x;end

def ct(u,v)
    return Rational(u.denominator*v.denominator,(u.numerator*v.denominator).gcd(v.numerator*u.denominator))
end

a,b,c=[gets,gets,gets].map{|e|Rational(e.to_i,1)}

dbc=abs(1/b-1/c)
dac=abs(1/a-1/c)
abc=   (1/b+1/c)
aac=   (1/a+1/c)

puts [ct(dac,dbc),ct(dac,abc),ct(aac,dbc),ct(aac,abc)].min