#include<bits/stdc++.h>
#define endl '\n'
using namespace std;
typedef long long ll;
void speed()
{
ios_base::sync_with_stdio(false);
cin.tie(NULL);
cout.tie(NULL);
}
const ll inf = 1e18;
const int maxn = 1e5 + 10;
int n;
ll h[maxn], w[maxn], pref[maxn], dp[maxn];
void solve()
{
cin >> n;
for (int i = 1; i <= n; i ++)
cin >> h[i];
for (int i = 1; i <= n; i ++)
cin >> w[i], pref[i] = pref[i - 1] + w[i];
dp[1] = 0;
for (int i = 2; i <= n; i ++)
{
dp[i] = inf;
for (int j = 1; j < i; j ++)
{
dp[i] = min(dp[i], dp[j] + pref[i - 1] - pref[j] + (h[i] - h[j]) * (h[i] - h[j]));
}
}
cout << dp[n] << endl;
}
int main()
{
solve();
return 0;
}
/**
6
3 8 7 1 6 6
0 -1 9 1 2 0
*/
