#include <bits/stdc++.h>
using namespace std;
#define int long long
#define rep(i,a,b) for (int i = a; i <= b; i++)
#define per(i,a,b) for (int i = a; i >= b; i--)
#define pii pair<int,int>
#define fi first
#define se second
const int MAXN = 1e5+10;
const int INF = 1e18+67;
int h[MAXN],w[MAXN], dp[MAXN];
int32_t main() {
ios_base::sync_with_stdio(0);cin.tie(nullptr);
int n; cin >> n;
rep(i,1,n) cin >> h[i];
rep(i,1,n) cin >> w[i];
dp[1] = -w[1]+2*h[1]*h[1];
rep(i,2,n) {
dp[i] = INF;
rep(j,1,i-1) dp[i] = min(dp[i],dp[j]-2*h[i]*h[j]);
dp[i] += 2*h[i]*h[i] - w[i];
}
int sw = 0;
rep(i,1,n) sw+=w[i];
cout << dp[n] - h[1]*h[1] - h[n]*h[n] + sw;
}
