#include <algorithm>
#include <cstdint>
#include <cstddef>
#include <functional>
#include <iostream>
#include <numeric>
#include <ranges>
#include <vector>

#include <atcoder/lazysegtree>

using range_add_range_min = atcoder::lazy_segtree<
    int,
    [](int x, int y) { return std::min(x, y); },
    []{ return 1 << 30; },
    int,
    [](int f, int x) { return f + x; },
    [](int f, int g) { return f + g; },
    []{ return 0; }
>;

int main() {
    std::ios::sync_with_stdio(false);
    std::cin.tie(nullptr);

    int n;
    std::string s;
    std::cin >> n >> s;

    std::vector<long long> a(2 * n);
    for (auto &e : a) std::cin >> e;

    std::vector<long long> cost(2 * n);

    long long ans = 0;
    for (int i = 0; i < 2 * n; ++i) {
        if (s[i] == '(') {
            ans += a[i];
            cost[i] = -a[i];
        } else {
            cost[i] = a[i];
        }
    }

    std::vector<int> p(2 * n);
    std::iota(p.begin(), p.end(), 0);
    std::ranges::sort(p, {}, [&cost](int i) { return cost[i]; });

    std::vector<int8_t> used(2 * n, false);

    std::vector<int> init(2 * n + 1);
    for (int i = 0; i < n; ++i) init[i + 1] = init[i] + 1;
    for (int i = n; i < 2 * n; ++i) init[i + 1] = init[i] - 1;
    range_add_range_min seg(init);

    int r = n - 1;
    for (int i : p) {
        used[i] = true;
        if (i <= r) {
            ans += cost[i];
            continue;
        }
        while (r >= 0 and used[r]) --r;
        if (r < 0) break;

        if (seg.prod(r + 1, i + 1) >= 2) {
            ans += cost[i];
            seg.apply(r + 1, i + 1, -2);
            --r;
        }
    }
    std::cout << ans << std::endl;
}