#include <bits/stdc++.h>
using namespace std;
#define REP(i,n) for (int i=0;i<(n);i++)
#define REP2(i,m,n) for (int i=m;i<(n);i++)
typedef long long ll;

int N;
ll s;
ll A[55];
ll B[55];
ll C[55];

ll solve(int M1, int M2) {
    vector<pair<ll, ll>> v;

    REP(mask, 1 << M1) {
        if (mask & (mask << 1)) continue;
        if (mask & (1 << (M1 - 1))) continue;
        ll b = 0;
        ll a = 0;
        REP(i, M1) if (mask & (1 << i)) b += B[i+1], a += A[i+1] + A[i] + C[i+1];
        v.push_back({a, b});
    }

    sort(v.rbegin(), v.rend());
    //REP(i, v.size()) v[i].first *= -1;
    for (int i = (int)v.size()-2; i >= 0; --i) v[i].second = max(v[i].second, v[i+1].second);


    ll ans = 0;

    REP(mask, 1 << M2) {
        if (mask & (mask << 1)) continue;
        if (mask & (1 << (M2 - 1))) continue;
        ll b = 0;
        ll a = 0;
        REP(i, M2) if (mask & (1 << i)) b += B[M1+i+1], a += A[M1+i+1] + A[M1+i] + C[M1+i+1];
        int hi = (int)v.size();
        int lo = -1;
        while (hi - lo > 1) {
            int mid = (hi + lo) / 2;
            if (v[mid].first + a > s) lo = mid;
            else hi = mid;
        }
        ans = max(ans, hi == v.size() ? 0L : v[hi].second + b);
    }

    return ans;
}

void solve() {
    cin >> N;
    REP(i, N) cin >> A[i] >> B[i] >> C[i];
    s = 0;
    REP(i, N) s += A[i];

    if (N <= 2) {
        cout << 0 << endl;
        return;
    }

    ll ans = 0;
    REP2(i, max(0, N / 2 - 2), min(N, N / 2 + 3)) {
        ans = max(ans, solve(i, N - i));
    }

    cout << ans << endl;
}

int main() {
    cin.tie(0);
    ios::sync_with_stdio(false);
    solve();
}