#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define ff first
#define ss second
#define pb push_back
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
#define N 100005
#define INF 0x3f3f3f3f3f3f3f3f
ll dp[N], h[N], p[N];
int main(){
ios_base::sync_with_stdio(0);
cin.tie(0);
cout.tie(0);
int n;
cin>>n;
for(int i = 1; i <= n; i++)
cin>>h[i];
for(int i = 1; i <= n; i++){
cin>>p[i];
p[i] += p[i - 1];
}
for(int i = 2; i <= n; i++){
dp[i] = 0x3f3f3f3f3f3f3f3f;
for(int j = 1; j < i; j++){
dp[i] = min(dp[i], dp[j] + p[i - 1] - p[j] + (h[i] - h[j]) * (h[i] - h[j]));
}
}
cout<<dp[n];
}
