#include <bits/stdc++.h>
#include <atcoder/segtree>

__attribute__((constructor))
void fast_io() {
    std::ios_base::sync_with_stdio(false);
    std::cin.tie(nullptr);
}
 

using S = std::pair<long long, long long>;
S op(S a, S b) {
    return {std::min(a.first, b.first), std::min(a.second, b.second)};
}
S e() { return {LLONG_MAX >> 1, LLONG_MAX >> 1}; };

int main() {
    size_t n;
    std::cin >> n;
    std::vector<long long> a(n), x(n), y(n);
    for (auto& ai : a) std::cin >> ai;
    for (auto& xi : x) std::cin >> xi;
    for (auto& yi : y) std::cin >> yi;

    long long xmax = *std::max_element(x.begin(), x.end());
    atcoder::segtree<S, op, e> seg(xmax + 1);
    long long dp = 0;
    for (size_t i = 0; i < n; ++i) {
        seg.set(x[i], {dp - x[i] + y[i], dp + x[i] + y[i]});
        dp = std::min(seg.prod(0, a[i]).first + a[i], seg.prod(a[i], xmax).second - a[i]);
    }
    std::cout << dp << '\n';
}