#include<iostream>
#include<vector>
#include<algorithm>
using namespace std;

#define rep(i,n) for(int i=0;i<(n);i++)

void chmin(int &l, int r){if(l>r)l=r;}

int main(){

  int n; cin>> n;
  vector<int> a(n+1);
  rep(i, n) cin>> a[i+1];
  vector<int> x(n+1);
  rep(i, n) cin>> x[i+1];
  vector<int> y(n+1);
  rep(i, n) cin>> y[i+1];

  const int inf=1e8;
  vector<int> dp(n+1, inf);
  dp[0]=0;
  for(int i=1; i<=n; i++){
    for(int j=1; j<=i; j++){
      chmin(dp[i], dp[j-1]+y[j]+abs(x[j]-a[i]));
    }
  }
  cout<< dp[n]<< endl;

  return 0;
}