N=gets.to_i
S=gets.split.map(&:to_i)
T=gets.split.map(&:to_i)
s=S.group_by{|i|i}
t=T.group_by{|i|i}
3.times{|i|
    s[i] ||= []
    t[i] ||= []
}
s2 = s[2].size
t2 = t[2].size
s1 = t2==0 ? s[1].size : 0
t1 = s2==0 ? t[1].size : 0
warn [s1,s2,t1,t2].inspect
r=0
r+=s2*N
r+=t2*N
r-=s2*t2
r+=[s1,t1].max
puts r