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

long long ans = 0;

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){
		if(money>=0){
			ans = max(love,ans);
		}
		return;
	}
	else if(ind==n+1){
		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);
}


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];
	}
	
	dfs1(a,b,c,0,0,0);
	
	cout<<ans<<endl;
	

	return 0;
}