/**
* Author: Lưu Diệp Thành (Save Diệp Thành)
* Le Hong Phong High School for the Gifted (i2528)
**/
#include<bits/stdc++.h>
using namespace std;
#define int long long
//#define ll long long
#define ushort unsigned short
#define FOR(i,l,r) for(int i = (l), _r = (r); i <= _r; i++)
#define FORN(i,r,l) for(int i = (r), _l = (l); i >= _l; i--)
#define endl '\n'
#define sz(x) (int)x.size()
#define fi first
#define se second
#define pb push_back
#define all(v) (v).begin(),(v).end()
#define MASK(x) (1LL << (x))
#define BIT(x,i) (((x) >> (i)) & 1)
#define ins insert
#define segleft (id<<1)
#define segright (id<<1|1)
#define TIME (1.0 * clock() / CLOCKS_PER_SEC)
const int MOD = 1e9+7;
struct Fenwick {
vector<vector<int>> pos;
vector<vector<int>> bit;
int n;
Fenwick() {}
void init(int _n) {
n = _n;
pos.assign(n+1, {});
bit.assign(n+1, {});
}
void fakeadd(int u, int v) {
int idx = u;
while(idx <= n) {
pos[idx].pb(v);
idx += (idx & -idx);
}
}
void fakeget(int u, int v) {
int idx = u;
while(idx > 0) {
pos[idx].pb(v);
idx -= (idx & -idx);
}
}
void compress() {
FOR(i, 1, n) {
sort(all(pos[i]));
pos[i].erase(unique(all(pos[i])), pos[i].end());
bit[i].assign(sz(pos[i])+5, 0);
}
}
int getindex(int i, int j) {
return lower_bound(all(pos[i]), j) - pos[i].begin() + 1;
}
void add(int x, int y, int v) {
for(int i = x; i <= n; i += (i & -i)) {
for(int j = getindex(i, y); j < sz(bit[i]); j += (j & -j)) {
bit[i][j] += v;
}
}
}
int get(int x, int y) {
int sum = 0;
for(int i = x; i > 0; i -= (i & -i)) {
for(int j = getindex(i, y); j > 0; j -= (j & -j)) {
sum += bit[i][j];
}
}
return sum;
}
int query(int x1, int y1, int x2, int y2) {
return get(x2, y2) - get(x1-1, y2) - get(x2, y1-1) + get(x1-1, y1-1);
}
};
struct infoValue {
int s,t,sum;
};
struct infoQuery {
int x,y,z;
int idQuery;
};
const int N = 1e5+5;
Fenwick bit;
vector<infoValue> a(N);
vector<infoQuery> query(N);
vector<int> ans(N);
vector<int> value;
int n,q;
void compress() {
sort(all(value));
value.erase(unique(all(value)), value.end());
}
int getvalue(int x) {
return lower_bound(all(value), x) - value.begin() + 1;
}
void precalc() {
int j = 1;
FOR(i, 1, q) {
while(j <= n && a[j].sum >= query[i].z) {
bit.fakeadd(a[j].s, a[j].t);
j++;
}
int x1 = query[i].x, y1 = query[i].y, x2 = sz(value), y2 = sz(value);
bit.fakeget(x2, y2);
bit.fakeget(x1-1, y2);
bit.fakeget(x2, y1-1);
bit.fakeget(x1-1, y1-1);
}
}
void calc() {
int j = 1;
FOR(i, 1, q) {
while(j <= n && a[j].sum >= query[i].z) {
bit.add(a[j].s, a[j].t, 1);
j++;
}
int x1 = query[i].x, y1 = query[i].y, x2 = sz(value), y2 = sz(value);
ans[query[i].idQuery] = bit.query(x1, y1, x2, y2);
}
}
void Semicolon() {
cin >> n >> q;
FOR(i, 1, n) {
cin >> a[i].s >> a[i].t;
a[i].sum = a[i].s + a[i].t;
value.pb(a[i].s);
value.pb(a[i].t);
}
FOR(i, 1, q) {
cin >> query[i].x >> query[i].y >> query[i].z;
query[i].idQuery = i;
value.pb(query[i].x);
value.pb(query[i].y);
}
compress();
bit.init(sz(value)+5);
FOR(i, 1, n) {
a[i].s = getvalue(a[i].s);
a[i].t = getvalue(a[i].t);
}
FOR(i, 1, q) {
query[i].x = getvalue(query[i].x);
query[i].y = getvalue(query[i].y);
}
sort(a.begin()+1, a.begin()+n+1, [](infoValue &left, infoValue &right) {
return left.sum > right.sum;
});
sort(query.begin()+1, query.begin()+q+1, [](infoQuery &left, infoQuery &right) {
return left.z > right.z;
});
precalc();
bit.compress();
calc();
FOR(i, 1, q) {
cout << ans[i] << endl;
}
}
signed main() {
ios_base::sync_with_stdio(0); cin.tie(0);
//freopen("", "r", stdin);
//freopen("", "w", stdout);
if (fopen("input.txt", "r")) freopen("input.txt", "r", stdin);
int t = 1;
//cin >> t;
while(t--) Semicolon();
cerr << endl;
cerr << "Time elapsed: " << TIME << " s.\n ";
return (0 ^ 0);
}
