#include <iostream>
#include <cmath>
#include <vector>
#include <algorithm>
#include <iterator>
#include <numeric>
#include <string>
#include <cstring>
#include <ctime>
#include <set>
#include <list>
#include <sstream>
#include <iomanip>
#include <map>
#include <stack>
#include <unordered_map>
#include <queue>
#include <deque>
#include <chrono>
#include <fstream>
#include <sstream>
#include <ostream>
#include <assert.h>
#include <cstdint>
#define ll long long
#define sync ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0)
#define PI 3.14159265358979323846 
#define all(c) (c).begin(), (c).end()
using namespace std;

void solve() {
	int n, m;
	cin >> n >> m;
	vector<pair<int, int>> a(n);
	for (int i = 0; i < n; i++) {
		cin >> a[i].first >> a[i].second;
	}
	for (int i = 0; i < m; i++) {
		int l, r, x;
		cin >> l >> r >> x;
		l--;
		int ans = 0;
		for (l; l < r; l++) {
			if (x >= a[l].first and x <= a[l].second) ans++;
		}
		cout << ans << '\n';
	}
}

int main() {
	sync;
	int t = 1;
	//cin >> t;
	while (t--) {
		solve();
	}
}