#include <bits/stdc++.h>
#pragma GCC optimize("O3,unroll-loops")
#pragma GCC target("avx2,bmi,bmi2,popcnt,lzcnt")
#define fio ios_base::sync_with_stdio(0);cin.tie(0);
#define ll long long
#define ld long double
#define en exit(0);
#define pb push_back
#define fi first
#define se second
using namespace std;
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
const int N = 2e3 + 5;
const ll INF = 1e18 + 5;
ll A[N], S[N], P[N], B[N], T[N], Q[N];
ll prefA[N], prefB[N];
ll prefP[N], prefQ[N];
ll dp[N][N];
int main()
{
fio
// ifstream cin("in.in");
int n, m;
cin >> n >> m;
for(int i = 1;i <= n;i++)
cin >> A[i] >> S[i] >> P[i];
for(int i = 1;i <= m;i++)
cin >> B[i] >> T[i] >> Q[i];
for(int i = 1;i <= n;i++)
prefA[i] = prefA[i - 1] + A[i],
prefP[i] = prefP[i - 1] + P[i];
for(int i = 1;i <= m;i++)
prefB[i] = prefB[i - 1] + B[i],
prefQ[i] = prefQ[i - 1] + Q[i];
// initialize the DP
for(int i = 0;i <= n;i++)
for(int j = 0;j <= m;j++)
dp[i][j] = -INF;
dp[0][0] = 0;
for(int i = 0;i <= n;i++)
{
for(int j = 0;j <= m;j++)
{
// take IOI Donburi
if(i - 1 >= 0)
{
ll pl = (prefA[i] + prefB[j] <= S[i] ? 1 : 0);
dp[i][j] = max(dp[i][j], dp[i - 1][j] + pl);
}
// take JOI Curry
if(j - 1 >= 0)
{
ll pl = (prefA[i] + prefB[j] <= T[j] ? 1 : 0);
dp[i][j] = max(dp[i][j], dp[i][j - 1] + pl);
}
}
}
cout << dp[n][m];
return 0;
}
