#include <iostream>

using namespace std;
int enem[2000][2000];
int dam[2000][2000];
int rudam[2000][2000];
int main(){
  int n,k;cin>>n>>k;


  for(int i = 0; n > i; i++){
    int x,y,hp;cin>>x>>y>>hp;
    enem[x+500][y+500] = hp;
  }

  for(int i = 0; k > i; i++){
    int ax,ay,w,h,d;cin>>ax>>ay>>w>>h>>d;
    dam[ax+500][ay+500] += d;
    dam[ax+500+w+1][ay+500] -= d;
    dam[ax+500][ay+500+h+1] -= d;
    dam[ax+500+w+1][ay+500+h+1] += d;
  }
  long long ans = 0;
  for(int i = 1; 1500 > i; i++){
    for(int j = 1; 1500 > j; j++){
      rudam[i][j] = rudam[i-1][j]+rudam[i][j-1]-rudam[i-1][j-1]+dam[i-1][j-1];
      ans += max(0,enem[i-1][j-1]-rudam[i][j]);
    }
  }
  cout << ans << endl;
}