#include <bits/stdc++.h>
using namespace std;
#define finish(x) return cout << x << endl, 0
#define ll long long
const int N = 100001;
const int A = 200001;
const int INF = (int)1e9;
#include <ext/pb_ds/assoc_container.hpp>
using namespace __gnu_pbds;
typedef tree <pair <int, int>, null_type, less <pair <int, int> >, rb_tree_tag, tree_order_statistics_node_update> ordered_set;
struct query{
int A, B, ind;
};
int n, m;
vector <pair <int, int> > a;
vector <query> q[A];
vector <int> sum[A];
ordered_set v[4 * N];
map <int, int> mp;
void insert(ordered_set &s, int v){
auto it = s.upper_bound(make_pair(v, INF));
if(it == s.begin()){
s.insert(make_pair(v, 0));
return;
}
it--;
if(it == s.end() || (*it).first != v) s.insert(make_pair(v, 0));
else s.insert(make_pair(v, (*it).second + 1));
}
void erase(ordered_set &s, int v){
auto it = s.upper_bound(make_pair(v, INF));
assert(it != s.begin());
it--;
assert((*it).first == v);
s.erase(it);
}
void update(int l, int r, int node, int ind, int val){
if(r < l || l > ind || r < ind) return;
insert(v[node], val);
if(l == r) return;
int mid = (l + r) / 2;
if(ind <= mid) update(l, mid, 2 * node, ind, val);
update(mid + 1, r, 2 * node + 1, ind, val);
}
int query(int l, int r, int node, int s, int e, int val){
if(r < l || r < s || l > e) return 0;
if(s <= l && r <= e){
return (int)v[node].size() - v[node].order_of_key(make_pair(val, -INF));
}
int mid = (l + r) / 2;
return query(l, mid, 2 * node, s, e, val) + query(mid + 1, r, 2 * node + 1, s, e, val);
}
void erase(int l, int r, int node, int ind){
if(r < l) return;
erase(v[node], a[ind].second);
if(l == r) return;
int mid = (l + r) / 2;
if(ind <= mid) erase(l, mid, 2 * node, ind);
else erase(mid + 1, r, 2 * node + 1, ind);
}
int query(int suffix, int val){
return query(0, n - 1, 1, suffix, n - 1, val);
}
int main(){
ios_base::sync_with_stdio(0);
cin.tie(0);
cin >> n >> m;
a.resize(n);
for(auto &i : a) cin >> i.first >> i.second;
sort(a.begin(), a.end());
for(int i = 0 ; i < n ; i++){
update(0, n - 1, 1, i, a[i].second);
}
for(int i = 0 ; i < n ; i++){
mp[a[i].first + a[i].second];
}
vector <pair <pair <int, int>, pair <int, int> > > queries;
for(int i = 0 ; i < m ; i++){
int x, y, z;
cin >> x >> y >> z;
queries.push_back(make_pair(make_pair(x, y), make_pair(z, i)));
mp[z];
}
int x = 0;
for(auto &i : mp) i.second = ++x;
for(auto &j : queries){
int x = j.first.first;
int y = j.first.second;
int z = j.second.first;
int i = j.second.second;
q[mp[z]].push_back({x, y, i});
}
for(int i = 0 ; i < n ; i++){
sum[mp[a[i].first + a[i].second]].push_back(i);
}
vector <int> ans(m);
for(int i = 0 ; i < A ; i++){
for(auto &j : q[i]){
int suff = lower_bound(a.begin(), a.end(), make_pair(j.A, -INF)) - a.begin();
if(suff == n) ans[j.ind] = 0;
else ans[j.ind] = query(suff, j.B);
}
for(auto &j : sum[i]){
erase(0, n - 1, 1, j);
}
}
for(auto &i : ans) cout << i << endl;
}
