#include <bits/stdc++.h>
using namespace std;
#define modulo 1000000007
#define mod(mod_x) ((((long long)mod_x+modulo))%modulo)
#define Inf 10000000000000000

vector<pair<long long,long long>> V1,V2,V3,V4;

void dfs1(vector<long long> &a,vector<long long> &b,vector<long long> &c,int ind,long long love,long long money){
	int n = a.size();
	if(ind==n){
		V1.emplace_back(money,love);
		return;
	}
	else if(ind==n+1){
		V2.emplace_back(money,love);
		return;
	}
	
	dfs1(a,b,c,ind+1,love,money+a[ind]);
	if(ind!=n-1)dfs1(a,b,c,ind+2,love+b[ind+1],money-c[ind+1]);
	else dfs1(a,b,c,ind+2,love,money);
}

void dfs2(vector<long long> &a,vector<long long> &b,vector<long long> &c,int ind,long long love,long long money,bool f){
	int n = a.size();
	if(ind==n){
		if(f)V3.emplace_back(money,love);
		else V4.emplace_back(money,love);
		return;
	}
	else if(ind==n+1){
		return;
	}
	
	dfs2(a,b,c,ind+1,love,money+a[ind],f);
	if(ind!=n-1)dfs2(a,b,c,ind+2,love+b[ind+1],money-c[ind+1],f);
	else dfs2(a,b,c,ind+2,love,money,f);
}


int main(){
	
	int D;
	cin>>D;
	
	vector<long long> a(D),b(D),c(D);
	
	for(int i=0;i<D;i++){
		cin>>a[i]>>b[i]>>c[i];
	}
	
	vector<long long> a1,a2,b1,b2,c1,c2;
	for(int i=0;i<D;i++){
		if(i<D/2){
			a1.push_back(a[i]);
			b1.push_back(b[i]);
			c1.push_back(c[i]);
		}
		else{
			a2.push_back(a[i]);
			b2.push_back(b[i]);
			c2.push_back(c[i]);
		}
	}
	
	dfs1(a1,b1,c1,0,0,0);
	
	dfs2(a2,b2,c2,0,0,0,true);
	
	if(b2.size()!=0)dfs2(a2,b2,c2,1,b2.front(),-c2.front(),false);
	
	sort(V3.begin(),V3.end());
	sort(V4.begin(),V4.end());
	
	long long last = 0;
	
	for(auto it = V3.rbegin();it!=V3.rend();it++){
		(*it).second = max((*it).second,last);
		last = (*it).second;
	}

	last=0;
	for(auto it = V4.rbegin();it!=V4.rend();it++){
		(*it).second = max((*it).second,last);
		last = (*it).second;
	}
	
	long long ans = 0;
	pair<long long,long long> P = make_pair(0,-Inf);
	for(int i=0;i<V1.size();i++){
		P.first = -V1[i].first;
		auto it = lower_bound(V3.begin(),V3.end(),P);
		if(it==V3.end())continue;
		ans = max(ans,V1[i].second + (*it).second);
	}
	
	for(int i=0;i<V2.size();i++){
		P.first = -V2[i].first;
		auto it = lower_bound(V4.begin(),V4.end(),P);
		if(it==V4.end())continue;
		ans = max(ans,V2[i].second + (*it).second);
	}
	
	
	cout<<ans<<endl;
	

	return 0;
}