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

map<long long,long long> mp1,mp2,mp3,mp4;

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){
		mp1[money] = max(mp1[money],love);
		return;
	}
	else if(ind==n+1){
		mp2[money] = max(mp2[money],love);
		return;
	}
	money+=a[ind];
	ind++;
	dfs1(a,b,c,ind,love,money);
	money-=a[ind-1];
	ind++;
	if(ind!=n+1){
		love+=b[ind-1];
		money-=c[ind-1];
		dfs1(a,b,c,ind,love,money);
		love-=b[ind-1];
		money+=c[ind-1];
	}
	else{
		dfs1(a,b,c,ind,love,money);
	}
	ind-=2;
}

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)mp3[money] = max(mp3[money],love);
		else mp4[money] = max(mp4[money],love);
		return;
	}
	else if(ind==n+1){
		return;
	}
	
	money+=a[ind];
	ind++;
	dfs2(a,b,c,ind,love,money,f);
	money-=a[ind-1];
	ind++;
	if(ind!=n+1){
		love+=b[ind-1];
		money-=c[ind-1];
		dfs2(a,b,c,ind,love,money,f);
		love-=b[ind-1];
		money+=c[ind-1];
	}
	else{
		dfs2(a,b,c,ind,love,money,f);
	}
	ind-=2;
}


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]);
		}
	}
	
	int ind;
	long long love;
	long long money;
	bool f;
	ind=0;
	love=0;
	money=0;
	f=true;
	
	dfs1(a1,b1,c1,ind,love,money);
	
	dfs2(a2,b2,c2,ind,love,money,f);
	f=false;
	ind=1;
	love=b2.front();
	money=-c2.front();
	
	if(b2.size()!=0){
		f=false;
		ind=1;
		love=b2.front();
		money=-c2.front();
		dfs2(a2,b2,c2,ind,love,money,f);
	}
	
	
	long long last = 0;
	
	for(auto it = mp3.rbegin();it!=mp3.rend();it++){
		(*it).second = max((*it).second,last);
		last = (*it).second;
	}

	last=0;
	for(auto it = mp4.rbegin();it!=mp4.rend();it++){
		(*it).second = max((*it).second,last);
		last = (*it).second;
	}
	
	long long ans = 0;
	
	for(auto x:mp1){
		auto it = mp3.lower_bound(-x.first);
		if(it==mp3.end())continue;
		ans = max(ans,x.second + (*it).second);
	}
	
	for(auto x:mp2){
		auto it = mp4.lower_bound(-x.first);
		if(it==mp4.end())continue;
		ans = max(ans,x.second + (*it).second);
	}
	
	
	cout<<ans<<endl;
	

	return 0;
}