#include <bits/stdc++.h>
using namespace std;
#ifdef LOCAL
#include "deb.h"
#else
#define debug(...)
#endif
#define pb emplace_back
#define all(a) (a).begin(), (a).end()
#define rep(i, n) for (int i = 0; i < n; i++)
#define per(i, n) for (int i = n - 1; i >= 0; i--)
#define sz(a) (int) (a).size()
#define f first
#define s second
using vi = vector<int>;
using ll = long long;
template <typename T>
class fenwick {
public:
map<T, T> fenw;
int n;
fenwick(int _n) : n(_n) {
}
void modify(int x, T v) {
while (x < n) {
fenw[x] += v;
x |= (x + 1);
}
}
T get(int x) {
T v{};
while (x >= 0) {
v += fenw[x];
x = (x & (x + 1)) - 1;
}
return v;
}
};
void solve() {
int n, q;
cin >> n >> q;
vector<pair<int, int>> a(n);
rep(i, n) {
cin >> a[i].f >> a[i].s;
}
vector<array<int, 4>> ft, st;
rep(i, q) {
int x, y, z;
cin >> x >> y >> z;
if (x + y >= z) {
ft.push_back({x, y, z, i});
} else {
st.push_back({x, y, z, i});
}
}
sort(all(a));
sort(all(ft));
fenwick<int> fenw_1(int(1e9) + 1);
int ptr = n - 1;
vi ans(q);
per(i, sz(ft)) {
while (a[ptr].f >= ft[i][0]) {
fenw_1.modify(a[ptr].s, 1);
ptr--;
}
ans[ft[i][3]] = fenw_1.get(int(1e9)) - fenw_1.get(ft[i][1] - 1);
}
rep(i, q) {
cout << ans[i] << '\n';
}
}
int main() {
ios::sync_with_stdio(false);
cin.tie(0);
int t = 1;
// cin >> t;
while (t--) {
solve();
}
return 0;
}
