This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include <bits/stdc++.h>
#define ll long long
#define ld long double
#define ff first
#define ss second
#define pii pair<int,int>
#define pll pair<long long, long long>
#define pb push_back
#define rep(i, b) for(int i = 0; i < (b); ++i)
#define rep2(i,a,b) for(int i = a; i <= (b); ++i)
#define rep3(i,a,b,c) for(int i = a; i <= (b); i+=c)
#define count_bits(x) __builtin_popcountll((x))
#define all(x) (x).begin(),(x).end()
#define size(x) (int)(x).size()
#define forall(it,x) for(auto& it:(x))
using namespace std;
//mt19937 mt;void random(){mt.seed(chrono::time_point_cast<chrono::milliseconds>(chrono::high_resolution_clock::now()).time_since_epoch().count());}
//ll rand(ll a, ll b) {return a + (mt() % (b-a+1));}
const int INF = 1e9+50;
const ll INF_L = 1e18+40;
const ll MOD = 1e9+7;
void solve()
{
int n,m;
cin >> n;
vector<pii> div;
vector<pii> zam;
rep(i,n)
{
int c,f,v;
cin >> c >> f >> v;
div.pb({v,f});
}
cin >> m;
rep(i,m)
{
int c,f,v;
cin >> c >> f >> v;
zam.pb({v,f});
}
sort(all(zam));
reverse(all(zam));
int ans = 0;
rep(i,m)
{
pii mini = {1e9,-1};
rep(j,n)
{
if(div[j].ss >= zam[i].ss)
{
mini = min(mini,{div[j].ff,i});
}
}
if(-mini.ff+zam[i].ff > 0)
{
ans += -mini.ff+zam[i].ff;
div[mini.ss] = {2e9,-1};
}
}
cout << ans << "\n";
}
int main()
{
ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
//random();
int t = 1;
// cin >> t;
while(t--) solve();
}
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