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#include <unordered_set>
#include <unordered_map>
#include <functional>
#include <algorithm>
//#include <iostream>
#include <numeric>
#include <cassert>
#include <cstring>
#include <cstdio>
#include <vector>
#include <queue>
//#include <cmath>
#include <set>
#include <map>
using namespace std;

typedef long long LL;
typedef unsigned long long ULL;
typedef vector<int> VI;
typedef vector<LL> VLL;
typedef vector<VI> VVI;
typedef pair<int,int> PII;
typedef vector<PII> VPII;

#define REP(i,n) for(int i=0;i<(n);++i)
#define FOR(i,b,e) for(int i=(b);i<=(e);++i)
#define FORD(i,b,e) for(int i=(b);i>=(e);--i)

#define PB push_back
#define ALL(V) (V).begin(),(V).end()
#define SIZE(V) ((int)(V).size())

#define MP make_pair
#define ST first
#define ND second

#define DBG

#ifdef DBG
	#define debug(...) fprintf(stderr, __VA_ARGS__)
#else
	#define debug(...)
#endif

int __stmp;
#define scanf __stmp=scanf


const int INF = 1000000001;
const int MAX = 200010;

class tree {
public:
	void init(int n) {
		for(size=1;size<n;size*=2);
		sum.assign(2*size+3, 0);
	}
	void add(int x, LL v) {
		for(x+=size;x;x/=2)
			sum[x] += v;
	}
	LL query(int e, LL cap) {
		assert(cap > 0);
		return _query(1, 0, size, 0, e+1, cap);
	}
private:
	int size;
	VLL sum;
	
	LL _query(int v, int b, int e, int k, int l, LL cap) {
		if(e <= k || l <= b) return 0;
		if(k <= b && e <= l) {
			LL res = 0;
			if(v < size) {
				if(sum[2*v+1]) {
					LL r = _query(2*v+1, (b+e)/2, e, k, l, cap);
					res += r;
				}
				if(res < cap && sum[2*v]) {
					LL r = _query(2*v, b, (b+e)/2, k, l, cap-res);
					res += r;
				}
				sum[v] = sum[2*v] + sum[2*v+1];
			} else {
				res = min(sum[v], cap);
				sum[v] -= res;
			}
			return res;
		}
		LL res = 0;
		if(sum[2*v+1])
			res = _query(2*v+1, (b+e)/2, e, k, l, cap);
		if(res < cap && sum[2*v]) {
			LL r = _query(2*v, b, (b+e)/2, k, l, cap-res);
			res += r;
		}
		sum[v] = sum[2*v] + sum[2*v+1];
		return res;
	}
};

struct point {
	LL x, y, c;
	int type;
	bool operator<(const point &rhs) const {
		if(y != rhs.y) return y < rhs.y;
		if(type != rhs.type) return type < rhs.type;
		return x < rhs.x;
	}
};

tree T;

point arr[2*MAX];
int n, m;
LL w, h;

int main(int argc, char *argv[]) {
	scanf("%d %d", &n, &m);
	scanf("%lld %lld", &w, &h);
	VLL coords;
	LL res = 0;
	REP(i,n+m)
	{
		LL _x, _y, c;
		scanf("%lld %lld %lld", &_x, &_y, &c);
		LL x = _y*w + _x*h;
		LL y = _y*w - _x*h;
		coords.PB(x);
		arr[i] = point{x, y, c, 1};
		if(i < n) {
			res += c;
			arr[i].type = 0;
		}
	}
	sort(ALL(coords));
	coords.resize(unique(ALL(coords)) - coords.begin());
	REP(i,n+m)
		arr[i].x = lower_bound(ALL(coords), arr[i].x) - coords.begin();
	T.init(SIZE(coords));
	sort(arr, arr+n+m);
	REP(i,n+m)
	{
		int x = arr[i].x;
		int type = arr[i].type;
		LL c = arr[i].c;
		if(type == 0) {
			T.add(x, c);
		} else {
			res -= T.query(x, c);
		}
	}
	printf("%lld\n", res);
	return 0;
}