#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef vector<pair<int, int>> vpii;
const int N = 5e4 + 5, M = 1e5 + 5, R = 1001;
vpii G[N], conv[R]; // (w = 0, w = 1)
struct query { ll u, a, b, id, ans; } Q[N]; 
int n, m, q;
void add(vpii &c, int x, int y) {
	if(c.empty()) { c.emplace_back(x, y); return; }
	if(c.back().second <= y) return;
	if(c.back().first == x)	y = min(c.back().second, y), c.pop_back();
	while(c.size() > 1) {
		int e = (int)c.size() - 1;
		if((ll)(c[e-1].second - c[e].second) * (c[e].first - x) 
			<= (ll)(c[e].second - y) * (c[e-1].first - c[e].first)) c.pop_back();
		else break;
	}
	c.emplace_back(x, y);
}
vpii merge(const vpii &A, const vpii &B, int dx, int dy) {
	int i = 0, j = 0;
	vpii res;
	while(i < A.size() && j < B.size()) {
		if(A[i].first <= B[i].first + dx) add(res, A[i].first, A[i].second), i++;
		else add(res, B[j].first + dx, B[j].second + dy), j++;
	}
	for(; i < A.size(); i++) add(res, A[i].first, A[i].second);
	for(; j < B.size(); j++) add(res, B[j].first + dx, B[j].second + dy);
	return res;
}
int main() {
	scanf("%d %d", &n, &m);
	for(int i = 1; i <= m; i++) {
		int u, v, c;
		scanf("%d %d %d", &u, &v, &c);
		G[v].emplace_back(u, c); // reversed edge
	}
	scanf("%d", &q);
	for(int i = 1; i <= q; i++) {
		scanf("%lld %lld %lld", &Q[i].a, &Q[i].b, &Q[i].u);
		Q[i].id = i;
	}
	sort(Q + 1, Q + q + 1, [&](const query &A, const query &B){ return A.u < B.u; });
	conv[1].emplace_back(0, 0);
	int cur = 1;
	for(int u = 1; u <= n; u++) {
		if(u >= R) conv[u % R].clear();
		for(auto e : G[u]) {
			int v = e.first, w = e.second;
			conv[u % R] = merge(conv[u % R], conv[v % R], w == 0, w == 1);
		}
		while(cur <= q && Q[cur].u == u) {
			ll ans = LLONG_MAX;
			for(auto p : conv[u % R]) {
				ans = min(ans, p.first * Q[cur].a + p.second * Q[cur].b);
			}
			Q[cur++].ans = ans;
		}
	}
	assert(cur == q + 1);
	sort(Q + 1, Q + q + 1, [&](const query &A, const query &B){ return A.id < B.id; });
	for(int i = 1; i <= q; i++) printf("%lld\n", Q[i].ans);
	return 0;
}