#include <bits/stdc++.h>
using namespace std;

#define int long long
#define rep(i,l,r) for(int i=(int)(l);i<(int)(r);i++)
#define all(x) (x).begin(),(x).end()
#define sz(x) ((int)x.size())
template<class T>bool chmax(T &a,T b){if(a<b){a=b;return 1;}return 0;}
template<class T>bool chmin(T &a,T b){if(a>b){a=b;return 1;}return 0;}

/*
*/

using vi = vector<int>;
using vvi = vector<vi>;
using P = pair<int,int>;

int w, a[55], b[55], c[55];

void dfs(int i, int n, int money, int like, vector<P> &v){
  if(i == n){
    v.emplace_back(money, like);
    return;
  }

  dfs(i+1, n, money+a[i], like, v);
  if(i+1 < n) dfs(i+2, n, money-c[i+1], like+b[i+1], v);
}

int solve(int half){
  vector<P> x, y;
  dfs(0, half, 0, 0, x);
  dfs(half, w, 0, 0, y);

  sort(all(x)); sort(all(y));

  int ma = -1e15;
  for(auto i = x.rbegin(); i != x.rend(); i++){
    chmax(ma, i->second);
    chmax(i->second, ma);
  }

  int ans = 0;
  for(auto i : y){
    auto j = lower_bound(all(x), P(-i.first, 0LL));
    if(j == x.end()) continue;
    chmax(ans, j->second + i.second);
  }

  return ans;
}

signed main() {
  cin >> w;
  rep(i, 0, w) cin >> a[i] >> b[i] >> c[i];

  cout << max(solve(w/2), solve(w/2+1)) << endl;

  return 0;
}