#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace std;
using namespace __gnu_pbds;
typedef tree<pair<int , pair<int , int> > , null_type, less<pair<int , pair<int , int> > >, rb_tree_tag, tree_order_statistics_node_update> ordered_set;
const int N = 1e6 + 5;
ordered_set bit[N];
void update(int x, int y , int idx)
{
for(int i = x; i < N; i += i & -i)
bit[i].insert({y, {x , idx}});
}
int query(int x, int y)
{
int ans = 0;
for(int i = x; i > 0; i -= i & -i)
{
ans += bit[i].order_of_key({y+1, {0 , -1}});
}
return ans;
}
/*int query(int x , int y)
{
int ans = 0 ;
while(x > 0)
{
int y1 = y ;
while(y1 > 0)
{
ans += bit[{x , y1}] ;
y1 -= (y1 & -y1) ;
}
x -= (x & -x) ;
}
return ans ;
}*/
int a[N], b[N] , ans[N];
int qa[N] , qb[N] , qc[N] , was[N] , was2[N];
vector<int>v ;
int n , q ;
void compress()
{
sort(v.begin() , v.end()) ;
v.erase(unique(v.begin() , v.end()) , v.end()) ;
for(int i = 0 ; i < n ; ++i)
{
int x = lower_bound(v.begin() , v.end() , a[i]) - v.begin() ;
int y = lower_bound(v.begin() , v.end() , b[i]) - v.begin() ;
x += 2 ;
y += 2 ;
was[x] = a[i] ;
was[y] = b[i] ;
a[i] = x ;
b[i] = y ;
}
for(int i = 0 ; i < q ; ++i)
{
int x = lower_bound(v.begin() , v.end() , qa[i]) - v.begin() ;
int y = lower_bound(v.begin() , v.end() , qb[i]) - v.begin() ;
int z = lower_bound(v.begin() , v.end() , qc[i]) - v.begin() ;
x += 2 ;
y += 2 ;
//z += 4 ;
was2[x] = qa[i] ;
was2[y] = qb[i] ;
//was2[z] = qc[i] ;
qa[i] = x ;
qb[i] = y ;
//qc[i] = z ;
}
return ;
}
int main()
{
scanf("%d %d" , &n, &q) ;
vector< pair<int , int> >vp ;
vector< pair<int , pair<int , pair<int , int> > > >vp2 ;
for(int i = 0 ; i < n ; ++i)
{
cin>>a[i]>>b[i] ;
a[i] += 2 ;
b[i] += 2 ;
v.push_back(a[i]) ;
v.push_back(b[i]) ;
//vp.push_back({a[i] , b[i]}) ;
}
for(int i = 0 ; i < q ; ++i)
{
int x , y , z ;
cin>>x>>y>>z ;
x += 2 ;
y += 2 ;
z += 4 ;
qa[i] = x ;
qb[i] = y ;
qc[i] = z ;
v.push_back(qa[i]) ;
v.push_back(qb[i]) ;
//v.push_back(qc[i]) ;
//vp2.push_back({x , {y , {z , i}}}) ;
//cout<<query(N-1 , N-1 , z) - query(x-1 , N-1 , z) - query(N-1 , y-1 , z) + query(x-1 , y-1 , z)<<"\n";
}
compress() ;
for(int i = 0 ; i < n ; ++i)
{
//cout<<was[a[i]]<<" "<<was[b[i]]<<"\n";
//cout<<was[a[i]]<<" "<<was[b[i]]<<"\n";
vp.push_back({a[i] , b[i]}) ;
}
//for(int i = 0 ; i < q ; ++i)
// cout<<was2[qa[i]]<<" "<<was2[qb[i]]<<" "<<was2[qc[i]]<<"\n";
for(int i = 0 ; i < q ; ++i)
{
vp2.push_back({qa[i] , {qb[i] , {qc[i] , i}}}) ;
}
sort(vp.begin() , vp.end()) ;
reverse(vp.begin() , vp.end()) ;
sort(vp2.begin() , vp2.end()) ;
reverse(vp2.begin() , vp2.end()) ;
int idx = 0 ;
const int N2 = 2e9+10 ;
for(int i = 0 ; i < q ; ++i)
{
while(idx < n && vp[idx].first >= vp2[i].first)
{
//cout<<vp[idx].second<<" "<<was[vp[idx].first] + was[vp[idx].second]<<"\n";
update(vp[idx].second , was[vp[idx].first] + was[vp[idx].second] , idx) ;
idx++ ;
}
int idxx = vp2[i].second.second.second ;
int x = vp2[i].second.first , y = vp2[i].second.second.first ;
ans[idxx] = query(N-1 , N2-1) - query(x-1 , N2-1) - query(N-1 , y-1) + query(x-1 , y-1) ;
}
for(int i = 0 ; i < q ; ++i)
cout<<ans[i]<<"\n";
return 0 ;
}
