#include <bits/stdc++.h>
using namespace std;
int main() {
  long long int a, b, c, sum = 0;
  vector<long long int> v1, v2, v3;
  cin >> a;
  for (int i = 0; i < a; i++) {
    cin >> b;
    v1.push_back(b);
  }
  for (int i = 0; i < a; i++) {
    cin >> b;
    sum = sum + b;
  }
  for (int i = 0; i < a - 1; i++) {
    cin >> b;
    v3.push_back(b);
  }
  sort(v3.begin(), v3.end());
  if (v3.size() > 1) {
    for (int i = 0; i < a - 2; i++) {
      sum = sum + v3[i];
    }
    cout << sum << endl;
  } else {
    sum = sum + v3[0];
    cout << sum << endl;
  }
}
