#include //#include //#pragma GCC optimize("O3") using namespace std; #define reps(i,s,n) for(int i = s; i < n; i++) #define rep(i,n) reps(i,0,n) #define Rreps(i,n,e) for(int i = n - 1; i >= e; --i) #define Rrep(i,n) Rreps(i,n,0) #define ALL(a) a.begin(), a.end() #define fi first #define se second using ll = long long; using vec = vector; using mat = vector; ll N,M,H,W,Q,K,A,B; string S; typedef pair P; const ll INF = (1LL<<48); int main() { cin>>N; vec a(N+1, (ll)2e+6), b(N+1, 0), ord(N+1); rep(i, N) cin>>a[i]; rep(i, N) cin>>b[i]; iota(ALL(ord), 0); sort(ALL(ord), [&](int x, int y){return a[x] < a[y];}); ll res(0); rep(i, N) { res += b[i+1] * (a[i+1] - a[0]); b[i+1] += b[i]; } int id(-1); rep(i, N){ //cout< b[N] - b[i]) {id = i; break;} res += (a[i+1] - a[i]) * (b[i] * 2 - b[N]); } cout<