#include<iostream>
#include<vector>
#include<algorithm>
using namespace std;
int W;
long A[55],B[55],C[55];
vector<pair<long,long> >X;
void dfs(int d,int lim,long x,long y)
{
	if(d==lim)
	{
		X.push_back(make_pair(y,x));
		return;
	}
	dfs(d+1,lim,x,y+A[d]);
	if(d+2<=lim)dfs(d+2,lim,x+B[d+1],y-C[d+1]);
}
main()
{
	cin>>W;
	for(int i=0;i<W;i++)cin>>A[i]>>B[i]>>C[i];
	if(W==1)
	{
		cout<<0<<endl;
		return 0;
	}
	long ans=0;
	for(int mid:(vector<int>){W/2-1,W/2})
	{
		dfs(0,mid,0,0);
		sort(X.rbegin(),X.rend());
		vector<pair<long,long> >A;
		long pre=0;
		for(pair<long,long>p:X)
		{
			if(pre<p.second)
			{
				pre=p.second;
				A.push_back(p);
			}
		}
		sort(A.begin(),A.end());
		X.clear();
		dfs(mid,W,0,0);
		for(pair<long,long>p:X)
		{
			vector<pair<long,long> >::iterator it=lower_bound(A.begin(),A.end(),make_pair(-p.first,0L));
			if(it!=A.end())ans=max(ans,p.second+it->second);
		}
		X.clear();
	}
	cout<<ans<<endl;
}