#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef unsigned long long ull;
#define forinc(i,a,b) for(int i=a;i<=b;++i)
#define fordec(i,a,b) for(int i=a;i>=b;--i)
const int SIZE=1<<10;
int pointer=SIZE;
char buffer[SIZE];
inline char readchar()
{
if(pointer==SIZE)
{
fread(buffer,1,SIZE,stdin);
pointer=0;
}
return buffer[pointer++];
}
#define getchar readchar
void read(int & x)
{
x=0;char c=getchar();
while(c<'0'||c>'9') c=getchar();
while('0'<=c&&c<='9'){x=x*10+c-'0';c=getchar();}
}
inline void out(int x)
{
if(x>9) out(x/10);
putchar(x%10+'0');
}
#define forv(a,b) for(auto &a:b)
#define pb push_back
#define pii pair<int,int>
#define fi first
#define se second
#define all(a) a.begin(),a.end()
#define reset(f,x) memset(f,x,sizeof(f))
#define bit(x,i) ((x>>(i-1))&1)
#define onbit(x,i) (x|(1<<(i-1)))
#define offbit(x,i) (x&~(1<<(i-1)))
#define read2(a,b) read(a),read(b)
#define read3(a,b,c) read(a),read(b),read(c)
const int N=100010;
int n,m,ans[N];
vector<int> t[N],e,sv[N];
struct oo {int x,y,z,id;} a[N],q[N];
bool cmp(oo u,oo v) {return u.x>v.x;}
int v(int x) {return lower_bound(all(e),x)-e.begin()+1;}
int vz(int i,int x) {return lower_bound(all(sv[i]),x)-sv[i].begin()+1;}
void add(int i,int j)
{
i=v(i);
for(;i;i-=i&-i) t[i].pb(0),sv[i].pb(j);
}
void update(int i,int j)
{
i=v(i);
for(;i;i-=i&-i)
{
int _j=vz(i,j);
for(;_j;_j-=_j&-_j) t[i][_j]++;
}
}
int get(int i,int j)
{
int g=0;
i=v(i);
for(;i<=n;i+=i&-i)
{
int _j=vz(i,j);
for(;_j<t[i].size();_j+=_j&-_j) g+=t[i][_j];
}
return g;
}
int main()
{
ios_base::sync_with_stdio(false);
cin.tie(nullptr);
//freopen("Examination.inp","r",stdin);
read2(n,m);
forinc(i,1,n)
{
read2(a[i].x,a[i].y),a[i].z=a[i].x+a[i].y;
e.pb(a[i].y);
}
sort(all(e));
forinc(i,1,m)
{
read3(q[i].x,q[i].y,q[i].z);
q[i].id=i;
}
forinc(i,1,n)
{
t[i].pb(0);
add(a[i].y,a[i].z);
}
forinc(i,1,n) sort(all(sv[i]));
sort(a+1,a+n+1,cmp);
sort(q+1,q+m+1,cmp);
int top=1;
forinc(i,1,m)
{
while(top<=n&&a[top].x>=q[i].x) update(a[top].y,a[top].z),top++;
ans[q[i].id]=get(q[i].y,q[i].z);
}
forinc(i,1,m) {out(ans[i]);putchar('\n');}
}
