#include <bits/stdc++.h>
using namespace std;
struct seg {
vector<long long> val, lazy;
int n, h;
seg(int _n): n(_n), h(32-__builtin_clz(_n)), val(2*_n,0), lazy(_n,0) {}
void app(int x, long long k) {
val[x] += k;
if(x < n)
lazy[x] += k;
}
void calc(int x) {
val[x] = max(val[x<<1],val[x<<1|1]) + lazy[x];
}
void push(int x) {
for(int i=h;i;i--) {
int y = (x >> i);
app(y<<1,lazy[y]);
app(y<<1|1,lazy[y]);
lazy[y] = 0;
}
}
void build(int x) {
while(x>>=1)
calc(x);
}
void up(int l, int r, long long x) {
int l0 = (l+=n);
int r0 = (r+=n);
push(l0);
push(r0);
for(r++;l<r;l>>=1,r>>=1) {
if(l&1)
app(l++,x);
if(r&1)
app(--r,x);
}
build(l0);
build(r0);
}
long long qry(int l, int r) {
push(l+=n);
push(r+=n);
long long ans = 0;
for(r++;l<r;l>>=1,r>>=1) {
if(l&1)
ans=max(ans,val[l++]);
if(r&1)
ans=max(ans,val[--r]);
}
return ans;
}
};
int main() {
int n, m;
cin >> n >> m;
long long a[n], s[n], b[m], t[m];
int p[n], q[m];
for(int i=0,trash;i<n;i++)
cin >> a[i] >> s[i] >> p[i];
for(int i=0,trash;i<m;i++)
cin >> b[i] >> t[i] >> q[i];
long long pa[n+1], pb[m+1];
pa[0] = pb[0] = 0;
partial_sum(a,a+n,pa+1);
partial_sum(b,b+m,pb+1);
long long ans = 0;
vector<pair<int,int>> out[n], in[n];
for(int i=0;i<n;i++) {
s[i] = upper_bound(pb,pb+m+1,s[i]-pa[i+1])-pb-1;
if(s[i] == m) {
s[i] = -1;
ans += p[i];
} else if((~s[i]) && p[i] >= 0)
out[i].push_back({s[i],p[i]});
else if(~s[i]) {
ans += p[i];
in[i].push_back({s[i],-p[i]});
}
}
for(int i=0;i<m;i++) {
t[i] = upper_bound(pa,pa+n+1,t[i]-pb[i+1])-pa-1;
if(t[i] == n) {
t[i] = -1;
ans+=q[i];
} else if((~t[i]) && q[i] >= 0)
in[t[i]].push_back({i,q[i]});
else if(~t[i]) {
ans += q[i];
out[t[i]].push_back({i,-q[i]});
}
}
seg dp(m+1);
for(int i=n;i--;) {
for(auto [j, v]: out[i]) {
dp.up(j,j,dp.qry(j,m)+v-dp.qry(j,j));
dp.up(0,j-1,v);
}
for(auto [j, v]: in[i])
dp.up(j+1,m,v);
}
cout << ans + dp.qry(0,m);
}
