#include<iostream>
#include<vector>
#include<algorithm>
#include<map>
using namespace std;
long long INF = 1LL << 62;
int main() {
	int W;
	cin >> W;
	vector<long long> a(W), b(W), c(W);
	for (int i = 0; i < W; i++) {
		cin >> a[i] >> b[i] >> c[i];
	}
  map<long long, long long> m;//m[money] = love
	auto dfs1 = [&](auto dfs1, long long love, long long money, int l, int r) -> void {
		if (l == r) {
			m[money] = max(m[money], love);
			return;
		}
		dfs1(dfs1, love, money + a[l], l + 1, r);
		if (l + 2 <= r) {
			dfs1(dfs1, love + b[l + 1], money - c[l + 1], l + 2, r);
		}
		};
	long long ans = 0;
  map<long long, long long> m2;
	auto dfs2 = [&](auto dfs2, long long love, long long money, int l, int r) -> void {
		if (l == r) {
			long long tmp = m2.lower_bound(-money)->second + love;
			ans = max(ans, tmp);
			return;
		}
		dfs2(dfs2, love, money + a[l], l + 1, r);
		if (l + 2 <= r) {
			dfs2(dfs2, love + b[l + 1], money - c[l + 1], l + 2, r);
		}
		};
	int mid = W / 2;
	dfs1(dfs1, 0LL, 0LL, 0, mid);
  m[INF] = -INF;
  auto itr = m.end();
  long long tmp = -INF;
  while (itr != m.begin()) {
    itr = prev(itr);
    m2[itr->first] = max(itr->second, tmp);
    tmp = max(tmp, m[itr->first]);
  }
	dfs2(dfs2, 0LL, 0LL, mid, W);
  m.clear();
  m2.clear();
  tmp = -INF;
  dfs1(dfs1, 0LL, 0LL, 0, mid - 1);
  m[INF] = -INF;
  itr = m.end();
  while (itr != m.begin()) {
    itr = prev(itr);
    m2[itr->first] = max(itr->second, tmp);
    tmp = max(tmp, m[itr->first]);
  }
	dfs2(dfs2, 0LL, 0LL, mid - 1, W);
  cout << ans << endl;
}