#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define pb push_back
#define ff first
#define ss second
#define all(s) s.begin(),s.end()
#define rall(s) s.rbegin(),s.rend()
int main(){
ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0);
ll n;
cin>>n;
ll h[n+5],w[n+5];
ll dp[n+5];
for(ll i=1;i<=n;i++){
cin>>h[i];
}
ll pre[n+5];
pre[0]=0;
for(ll i=1;i<=n;i++){
cin>>w[i];
pre[i]=pre[i-1]+w[i];
}
dp[1]=0;
for(ll i=2;i<=n;i++){
dp[i]=(ll)1e18;
for(ll j=1;j<i;j++){
dp[i]=min(dp[i],dp[j]+(h[i]-h[j])*(h[i]-h[j])+(pre[i-1]-pre[j]));
}
}
cout<<dp[n];
}
