#include <bits/stdc++.h>
#define ll long long
using namespace std;
const int Nmax = 1e5 + 5;
int n;
ll h[Nmax], w[Nmax];
ll preW[Nmax], dp[Nmax];
int main(){
ios::sync_with_stdio(false);
cin.tie(nullptr);
cin >> n;
for(int i = 1; i <= n; i++) cin >> h[i];
for(int i = 1; i <= n; i++) cin >> w[i];
for(int i = 1; i <= n; i++){
preW[i] = preW[i - 1] + w[i];
}
dp[1] = 0;
for(int i = 2; i <= n; i++){
dp[i] = 1e18;
for(int j = 1; j < i; j++){
ll cost = dp[j]
+ (preW[i - 1] - preW[j])
+ (h[i] - h[j]) * (h[i] - h[j]);
dp[i] = min(dp[i], cost);
}
}
cout << dp[n];
}
