N=int(input())
A=list(map(int,input().split()))
B=list(map(int,input().split()))
lis=[]
for i in range(2*N):
    lis.append([A[i]+B[i],A[i],B[i]])
lis.sort()
ans=sum(A)
for i in range(2*N):
    #print(lis)
    if i%2==1:
        ans-=lis[i][0]
print(ans)