#include <bits/stdc++.h>
using namespace std;
#define ll long long
ll time1[1'000'003];
ll time2[1'000'003];
ll crit1[1'000'003];
ll crit2[1'000'003];
ll pts1[1'000'003];
ll pts2[1'000'003];
ll dp[2'002][2'002];
int main()
{
ios::sync_with_stdio(0); cin.tie(0);
ll n, m;
cin >> n >> m;
bool sub1 = 1;
for (ll i = 1; i <= n; i++)
{
cin >> time1[i] >> crit1[i] >> pts1[i];
if (i && crit1[i] != crit1[i-1])sub1 = 0;
time1[i] += time1[i-1];
}
for (ll i = 1; i <= m; i++)
{
cin >> time2[i] >> crit2[i] >> pts2[i];
if (i && crit2[i] != crit2[i-1])sub1 = 0;
time2[i] += time2[i-1];
}
ll ans = 0;
if (n <= 2e3 && m <= 2e3)
{
dp[1][0] = !!(time1[1]<=crit1[1]);
dp[0][1] = !!(time2[1]<=crit2[1]);
for (ll i = 1; i <= n; i++)
{
for (ll j = 1; j <= m; j++)
{
dp[i][j] = max(dp[i-1][j] + !!(time1[i]+time2[j] <= crit1[i]), dp[i][j-1] + !!(time1[i]+time2[j] <= crit2[j]));
}
}
ans = dp[n][m];
}
else
{
for (ll i = 1; i <= m; i++)
pts2[i] += pts2[i-1];
for (ll i = 1; i <= n; i++)
pts1[i] += pts1[i-1];
ll c = crit1[1];
ll j = 0;
for (ll i = n; i > 0; i++)
{
if (time1[i] > c)continue;
while(time2[j+1] + time1[i] <= c)
{
j++;
}
ans = max(ans, pts1[i] + pts2[j]);
}
}
cout << ans << '\n';
}
