//DUEL
#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#define x first
#define y second
#define pii pair<int,int>
#define pb push_back
#define eb emplace_back
#pragma GCC optimize("unroll-loops")
#define shandom_ruffle(a, b) shuffle(a, b, rng)
#define vi vector<int>
#define vl vector<ll>
#define popcnt __builtin_popcount
#define popcntll __builtin_popcountll
#define all(a) begin(a),end(a)
using namespace std;
using namespace __gnu_pbds;
using ll=long long;
using ull=unsigned long long;
using ld=long double;
int MOD=1000000007;
int MOD2=998244353;
vector<int> bases;
const ll LLINF=1ll<<60;
const char en='\n';
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
void yes() {cout<<"YES"<<en; exit(0);}
void no() {cout<<"NO"<<en; exit(0);}
inline int rund() {int x576363482791fuweh=rng();return abs(x576363482791fuweh)%RAND_MAX;}
template<class T>
void prVec(vector<T> w,bool fl=false)
{
cout<<w.size()<<en;
for (int i=0;i<int(w.size())-1;++i) cout<<w[i]<<' ';
if (w.size()) cout<<w[w.size()-1]<<en;
if (fl) cout<<flush;
}
void M998()
{
swap(MOD,MOD2);
}
ll raand()
{
ll a=rund();
a*=RAND_MAX;
a+=rund();
return a;
}
#define rand raand
ll raaand()
{
return raand()*(MOD-7)+raand();
}
void compress(vi&v)
{
set<int> s;
for (auto a: v) s.insert(a);
vi o(all(s));
for (auto&a: v) a=lower_bound(all(o),a)-o.begin();
}
void compress(vl&v)
{
set<ll> s;
for (auto a: v) s.insert(a);
vl o(all(s));
for (auto&a: v) a=lower_bound(all(o),a)-o.begin();
}
string to_upper(string a)
{
for (int i=0;i<(int)a.size();++i) if (a[i]>='a' && a[i]<='z') a[i]-='a'-'A';
return a;
}
string to_lower(string a)
{
for (int i=0;i<(int)a.size();++i) if (a[i]>='A' && a[i]<='Z') a[i]+='a'-'A';
return a;
}
ll sti(string a,int base=10)
{
ll k=0;
for (int i=0;i<(int)a.size();++i)
{
k*=base;
k+=a[i]-'0';
}
return k;
}
template<class T>
void eras(vector<T>& a,T b)
{
a.erase(find(a.begin(),a.end(),b));
}
string its(ll k,int base=10)
{
if (k==0) return "0";
string a;
while (k)
{
a.push_back((k%base)+'0');
k/=base;
}
reverse(a.begin(),a.end());
return a;
}
ll min(ll a,int b)
{
if (a<b) return a;
return b;
}
ll min(int a,ll b)
{
if (a<b) return a;
return b;
}
ll max(ll a,int b)
{
if (a>b) return a;
return b;
}
ll max(int a,ll b)
{
if (a>b) return a;
return b;
}
ll gcd(ll a,ll b)
{
if (b==0) return a;
return gcd(b,a%b);
}
ll lcm(ll a,ll b)
{
return a/gcd(a,b)*b;
}
template<class T,class K>
pair<T,K> mp(T a,K b)
{
return make_pair(a,b);
}
inline int mult(ll a,ll b)
{
return (a*b)%MOD;
}
inline int pot(int n,int k)
{
if (k==0) return 1;
ll a=pot(n,k/2);
a=mult(a,a);
if (k%2) return mult(a,n);
else return a;
}
int divide(int a,int b)
{
return mult(a,pot(b,MOD-2));
}
inline int sub(int a,int b)
{
if (a-b>=0) return a-b;
return a-b+MOD;
}
inline int add(int a,int b)
{
if (a+b>=MOD) return a+b-MOD;
return a+b;
}
bool prime(ll a)
{
if (a==1) return 0;
for (int i=2;i<=round(sqrt(a));++i)
{
if (a%i==0) return 0;
}
return 1;
}
const int N=1000010;
int t,n,m;
ll re;
ll ti1[N],req1[N],rew1[N];
ll ti2[N],req2[N],rew2[N];
vector<pair<int,ll>> v[N];
map<ll,ll> mare;
int main()
{
ios_base::sync_with_stdio(false);
cin.tie(0);
for (int i=0;i<10;++i) bases.push_back(rand()%(MOD-13893829*2)+13893829);
cin>>n>>m;
for (int i=1;i<=n;++i) cin>>ti1[i]>>req1[i]>>rew1[i],ti1[i]+=ti1[i-1];
for (int i=1;i<=m;++i) cin>>ti2[i]>>req2[i]>>rew2[i],ti2[i]+=ti2[i-1];
for (int i=1;i<=n;++i)
{
if (req1[i]<ti1[i]) continue;
int ind=upper_bound(ti2,ti2+m+1,req1[i]-ti1[i])-ti2;
if (ind==m+1) re+=rew1[i];
else v[ind].eb(i,rew1[i]);
}
for (int i=1;i<=m;++i)
{
if (req2[i]<ti2[i]) continue;
int ind=upper_bound(ti1,ti1+n+1,req2[i]-ti2[i])-ti1;
re+=rew2[i];
if (ind!=n+1) v[i].eb(ind,-rew2[i]);
}
//cout<<re<<en;
mare[MOD]=LLINF;
for (int i=1;i<=m;++i)
{
sort(all(v[i]));
//ll ma=0,cur=0;
for (auto a: v[i])
{
mare[a.x]+=a.y;
//ma=max(ma,cur);
//cout<<a.x<<' '<<a.y<<' '<<cur<<' '<<ma<<en;
//cout<<a.x<<' '<<a.y<<en;
}
set<int> z;
for (auto a: v[i]) z.insert(a.x);
while (z.size())
{
int ind=*z.begin();
z.erase(z.begin());
if (mare[ind]>0) continue;
auto it=mare.upper_bound(ind);
it->y+=mare[ind];
z.insert(it->x);
mare.erase(ind);
}
/*cout<<en;
for (auto a: mare) cout<<a.x<<' '<<a.y<<en;
cout<<en<<en;*/
//cout<<en;
//re+=ma;
}
for (auto a: mare) re+=a.y;
cout<<re-mare[MOD]<<en;
}
