#include<bits/stdc++.h>
using namespace std;
#define REP(i, from, to) for (ll i=(from);i<=(to);++i)
#define PER(i, from, to) for (ll i=(from);i>=(to);--i)
#define ALL(x) (x).begin(), (x).end()
#define SZ(x) (ll)(x).size()
#define PB push_back
#define MP make_pair
#define F first
#define S second
typedef long long ll;
typedef pair<ll, ll> pll;
typedef vector<ll> vll;
void solve(){
int n; cin>>n;
vector<array<ll, 3>> a(n);
int sum = 0;
REP(i, 0, n-1) {
cin>>a[i][0]>>a[i][1]>>a[i][2];
sum += a[i][0];
}
int m; cin>>m;
deque<array<ll, 3>> b(m);
REP(j, 0, m-1) cin>>b[j][0]>>b[j][1]>>b[j][2];
const ll INF = 1e18;
vll dp1(sum+1, INF), dp2(sum+1, 0);
dp1[0] = 0;
REP(i, 0, n-1){
PER(x, sum, a[i][0]){
dp1[x] = min(dp1[x], dp1[x-a[i][0]] + a[i][2]);
}
}
REP(i, 0, m-1){
PER(x, sum, b[i][0]){
dp2[x] = max(dp2[x], dp2[x-b[i][0]] + b[i][2]);
}
}
ll best = 0;
REP(x, 0, sum) best = max(best, dp2[x] - dp1[x]);
cout << best << endl;
}
int main(){
ios::sync_with_stdio(false);
cin.tie(0);
int tt=1;
// cin>>tt;
while(tt--) solve();
}
