#include <bits/stdc++.h>
#ifdef LOCAL
#include "debug.h"
#else
#define debug(...) 42
#endif
#pragma GCC optimize("Ofast,unroll-loops")
using namespace std;
#define endl '\n'
#define ll long long
#define all(x) x.begin(), x.end()
vector<ll> s[400002], sum[400002];
vector<pair<ll, ll>> v;
vector<ll> val;
void merge(int k) {
vector<ll> l = s[k * 2], r = s[k * 2 + 1];
int p1 = 0, p2 = 0;
while (p1 < l.size() && p2 < r.size()) {
if (l[p1] <= r[p2]) s[k].push_back(l[p1++]);
else s[k].push_back(r[p2++]);
}
while (p1 < l.size()) s[k].push_back(l[p1++]);
while (p2 < r.size()) s[k].push_back(r[p2++]);
l = sum[k * 2], r = sum[k * 2 + 1];
p1 = p2 = 0;
while (p1 < l.size() && p2 < r.size()) {
if (l[p1] <= r[p2]) sum[k].push_back(l[p1++]);
else sum[k].push_back(r[p2++]);
}
while (p1 < l.size()) sum[k].push_back(l[p1++]);
while (p2 < r.size()) sum[k].push_back(r[p2++]);
}
void build(int k, int l, int r) {
if (l == r) {
s[k].push_back(v[l].second);
sum[k].push_back(v[l].first + v[l].second);
return;
}
build(k * 2, l, (l + r) / 2);
build(k * 2 + 1, (l + r) / 2 + 1, r);
merge(k);
}
ll ans = 0;
void query(int k, int l, int r, int i, int j, ll bValue, ll sumValue) {
if (l > j || r < i) return;
if (i <= l && r <= j) {
if (s[k][0] >= bValue) {
if (sumValue > sum[k][sum[k].size() - 1]) return;
int lower = lower_bound(all(sum[k]), sumValue) - sum[k].begin();
ans += sum[k].size() - lower;
return;
}
}
if (s[k * 2][s[k * 2].size() - 1] >= bValue) query(k * 2, l, (l + r) / 2, i, j, bValue, sumValue);
if (s[k * 2 + 1][s[k * 2 + 1].size() - 1] >= bValue) query(k * 2 + 1, (l + r) / 2 + 1, r, i, j, bValue, sumValue);
}
int main() {
ios_base::sync_with_stdio(false);
cin.tie(NULL);
int n, q;
cin >> n >> q;
v.resize(n);
val.resize(n);
for (int i = 0; i < n; i++) {
cin >> v[i].first >> v[i].second;
val[i] = v[i].first;
}
sort(all(v));
sort(all(val));
build(1, 0, n - 1);
while (q--) {
ll x, y, z;
cin >> x >> y >> z;
if (x > val[n - 1]) {
cout << 0 << endl;
continue;
}
int lower = lower_bound(all(val), x) - val.begin();
ans = 0;
query(1, 0, n - 1, lower, n - 1, y, z);
cout << ans << endl;
}
}
