#include "bits/stdc++.h"
using namespace std;
#include "ext/pb_ds/assoc_container.hpp"
#include "ext/pb_ds/tree_policy.hpp"
using namespace __gnu_pbds;
template<class T> using oset = tree<T, null_type, less_equal<T>,
rb_tree_tag, tree_order_statistics_node_update>;
#define ar array
typedef int64_t ll;
#define sow cerr<<"here"<<endl;
const int N = 1e5 + 5;
struct node{
int sum, L, R;
node(){
sum = L = R = 0;
}
};
struct ST{
vector<node> tree;
int last;
ST(){
last = 1;
tree.resize(1);
}
void pot(int x){
if(!tree[x].L) tree[x].L = last++, tree.resize(last);
if(!tree[x].R) tree[x].R = last++, tree.resize(last);
}
void add(int i, int v, int lx = 0, int rx = N, int x = 0){
if(lx == rx){
tree[x].sum += v;
return;
} int m = (lx + rx) >> 1;
pot(x);
if(i <= m) add(i, v, lx, m, tree[x].L);
else add(i, v, m + 1, rx, tree[x].R);
tree[x].sum = tree[tree[x].L].sum + tree[tree[x].R].sum;
}
int get(int l, int r, int lx = 0, int rx = N, int x = 0){
if(lx > r || rx < l) return 0;
if(lx >= l && rx <= r) return tree[x].sum;
int m = (lx + rx) >> 1, res = 0;
if(tree[x].L) res += get(l, r, lx, m, tree[x].L);
if(tree[x].R) res += get(l, r, m + 1, rx, tree[x].R);
return res;
}
};
struct ST2{
ST tree[N << 2];
void add(int i, int v, int lx = 0, int rx = N, int x = 1){
tree[x].add(v, 1);
if(lx == rx) return;
int m = (lx + rx) >> 1;
if(i <= m) add(i, v, lx, m, x << 1);
else add(i, v, m + 1, rx, x << 1 | 1);
}
int get(int l, int v, int lx = 0, int rx = N, int x = 1){
if(rx < l) return 0;
if(lx >= l){
return tree[x].get(v, N);
} int m = (lx + rx) >> 1;
return get(l, v, lx, m, x << 1) + get(l, v, m + 1, rx, x << 1 | 1);
}
}T;
int s[N], t[N], x[N], y[N], z[N], res[N];
signed main(){
ios::sync_with_stdio(0); cin.tie(0);
int n, q; cin >> n >> q;
vector<int> P(n), zh, zhs;
for(int i=0;i<n;i++){
cin >> s[i] >> t[i];
P[i] = i;
zh.push_back(t[i]);
zhs.push_back(s[i] + t[i]);
}
sort(zh.begin(), zh.end());
zh.erase(unique(zh.begin(), zh.end()), zh.end());
sort(zhs.begin(), zhs.end());
zhs.erase(unique(zhs.begin(), zhs.end()), zhs.end());
vector<int> p(q);
for(int i=0;i<q;i++){
cin >> x[i] >> y[i] >> z[i];
p[i] = i;
}
sort(p.begin(), p.end(), [&](int i, int j){
return x[i] > x[j];
});
sort(P.begin(), P.end(), [&](int i, int j){
return s[i] > s[j];
});
auto add = [&](int i){
int x = lower_bound(zh.begin(), zh.end(), t[i]) - zh.begin();
int y = lower_bound(zhs.begin(), zhs.end(), s[i] + t[i]) - zhs.begin();
T.add(x, y);
};
int j = 0;
for(auto i : p){
while(j < n && s[P[j]] >= x[i]){
add(P[j++]);
}
int k = lower_bound(zh.begin(), zh.end(), y[i]) - zh.begin();
int l = lower_bound(zhs.begin(), zhs.end(), z[i]) - zhs.begin();
res[i] = T.get(k, l);
}
for(int i=0;i<q;i++) cout<<res[i]<<"\n";
}
