/*
ID: varunra2
LANG: C++
TASK: exam
*/
#include <bits/stdc++.h>
using namespace std;
#ifdef DEBUG
#include "lib/debug.h"
#define debug(...) cerr << "[" << #__VA_ARGS__ << "]:", debug_out(__VA_ARGS__)
#define debug_arr(...) \
cerr << "[" << #__VA_ARGS__ << "]:", debug_arr(__VA_ARGS__)
#pragma GCC diagnostic ignored "-Wsign-compare"
//#pragma GCC diagnostic ignored "-Wunused-parameter"
//#pragma GCC diagnostic ignored "-Wunused-variable"
#else
#define debug(...) 42
#endif
// #define int long long
#define EPS 1e-9
#define IN(A, B, C) assert(B <= A && A <= C)
#define INF (int)1e9
#define MEM(a, b) memset(a, (b), sizeof(a))
#define MOD 1000000007
#define MP make_pair
#define PB push_back
#define all(cont) cont.begin(), cont.end()
#define rall(cont) cont.end(), cont.begin()
#define x first
#define y second
const double PI = acos(-1.0);
typedef long long ll;
typedef long double ld;
typedef pair<int, int> PII;
typedef map<int, int> MPII;
typedef multiset<int> MSETI;
typedef set<int> SETI;
typedef set<string> SETS;
typedef vector<int> VI;
typedef vector<PII> VII;
typedef vector<VI> VVI;
typedef vector<string> VS;
#define rep(i, a, b) for (int i = a; i < (b); ++i)
#define trav(a, x) for (auto& a : x)
#define sz(x) (int)(x).size()
typedef pair<int, int> pii;
typedef vector<int> vi;
#pragma GCC diagnostic ignored "-Wsign-compare"
// util functions
const int maxn = 1e5;
const int MAX = 4 * maxn + 5;
struct sparsebit {
map<int, MPII> fen;
void upd(int x, int y, int val) {
for (int i = x; i <= MAX; i += (i & -i)) {
for (int j = y; j <= MAX; j += (j & -j)) {
// debug(i, j, 1);
fen[i][j] += val;
}
}
}
int qry(int x, int y) {
int ret = 0;
for (int i = x; i > 0; i -= (i & -i)) {
for (int j = y; j > 0; j -= (j & -j)) {
ret += fen[i][j];
}
}
return ret;
}
int qry(int a, int b, int c, int d) {
int ret = 0;
ret += qry(c, d);
if (a) ret -= qry(a - 1, d);
if (b) ret -= qry(c, b - 1);
if (a and b) ret += qry(a - 1, b - 1);
return ret;
}
};
MPII comp;
void compress(VI vals) {
sort(all(vals));
vals.resize(unique(all(vals)) - vals.begin());
for (int i = 0; i < sz(vals); i++) {
comp[vals[i]] = i + 2;
}
}
int32_t main() {
// #ifndef ONLINE_JUDGE
// freopen("exam.in", "r", stdin);
// freopen("exam.out", "w", stdout);
// #endif
cin.sync_with_stdio(0);
cin.tie(0);
int n, q;
cin >> n >> q;
VVI vals(n);
VVI qrys(q);
VI cmp;
for (int i = 0; i < n; i++) {
int s, t;
cin >> s >> t;
vals[i] = {s + t, s, t};
cmp.PB(s);
cmp.PB(t);
}
for (int i = 0; i < q; i++) {
int x, y, z;
cin >> x >> y >> z;
qrys[i] = {z, x, y, i};
cmp.PB(x);
cmp.PB(y);
}
compress(cmp);
sort(all(vals));
sort(all(qrys));
sparsebit bit;
reverse(all(vals));
reverse(all(qrys));
int p1 = 0;
VI ret(q, 0);
for (int i = 0; i < q; i++) {
while (p1 < n and vals[p1][0] >= qrys[i][0]) {
bit.upd(comp[vals[p1][1]], comp[vals[p1][2]], 1);
p1++;
}
ret[qrys[i][3]] = bit.qry(comp[qrys[i][1]], comp[qrys[i][2]], MAX, MAX);
}
for (int i = 0; i < q; i++) {
cout << ret[i] << '\n';
}
return 0;
}
