n=int(input()) A,B=[tuple(map(int,input().split())) for _ in range(2)] X=list(zip(A,B)) X.sort() A,B=zip(*X) X=[0] for x in B: X.append(X[-1]+x) kazuppa=0 for i in range(n): kazuppa+=B[i]*(A[i]-A[0]) ind=0 mn=kazuppa for i in range(1,n): kazuppa+=X[i]*(A[i]-A[i-1]) kazuppa-=(X[-1]-X[i])*(A[i]-A[i-1]) if kazuppa