#include <bits/stdc++.h>
#include <atcoder/all>
using namespace std;
using namespace atcoder;
using ll=long long;

int main()
{
    int n;
    cin>>n;
    vector<int> a(2*n);
    vector<ll> l(2*n),r(2*n);
    for(int i=0;i<2*n;i++){
        char c;
        cin>>c;
        if(c=='(')a[i]=1;
        else a[i]=-1;
        cin>>l[i]>>r[i];
    }
    int ps=0,ss=0;
    ll score=0;
    priority_queue<ll> pq;
    for(int i=2*n-1;i>=0;i--){
        if(a[i]==1){
            if(l[i]>=r[i]){
                score+=l[i];
                ps++;
            }else{
                score+=r[i];
                ss--;
                pq.push(l[i]-r[i]);    
            }
        }else{
            if(r[i]>=l[i]){
                score+=r[i];
                ss++;
            }else{
                score+=l[i];
                ps--;
                pq.push(r[i]-l[i]);
            }
        }
        if(ps<0||ss<0){
            score+=pq.top();
            pq.pop();
            ps++;
            ss++;
        }
    }
    cout<<score<<endl;
    

    return 0;
}