#include <bits/stdc++.h> using namespace std; using ll = long long; template<class T> istream& operator >> (istream& is, vector<T>& vec) { for(T& x : vec) is >> x; return is; } int main(){ ios::sync_with_stdio(false); cin.tie(0); int n; string s; cin >> n >> s; n *= 2; vector<ll> a(n); cin >> a; vector<vector<ll>> dp(n + 1, vector<ll>(n + 1, 1ll << 60)); dp[0][0] = 0; for(int i = 0; i < n; i++){ dp[i + 1][1] = min(dp[i + 1][1], dp[i][0] + (s[i] == ')' ? a[i] : 0)); for(int j = 1; j <= i; j++){ dp[i + 1][j + 1] = min(dp[i + 1][j + 1], dp[i][j] + (s[i] == ')' ? a[i] : 0)); dp[i + 1][j - 1] = min(dp[i + 1][j - 1], dp[i][j] + (s[i] == '(' ? a[i] : 0)); } } cout << dp[n][0] << '\n'; }