using System;
using System.Collections.Generic;
using System.Collections;
using System.Collections.Specialized;
using System.Linq;
using System.Text;
using System.IO;
using System.Reflection;
using static System.Math;
using System.Numerics;
static class Program{
	const int mod=(int)1e9+7;
	static void Main(){
		Sc sc=new Sc();
		var s=sc.Ia;
		Fc fc=new Fc(s[0]+1);
		for(int i = 0;i<s[1];i++) {
			var e=sc.Ia;
			fc.Ud(e[0],e[1]);
		}
		fc.Dn();
		StringBuilder sb=new StringBuilder();
		for(int i = 0;i<s[2];i++) {
			var e=sc.Ia;
			sb.Append(fc.Get(e[0],e[1],e[0],e[1])+"\n");
		}
		Console.Write(sb);
	}
}
public class Fc{
	private List<Tuple<int,int,int>>[] dat;
	private int m=1,cnt=0;
	public Fc(int n){
		while(m<n){m<<=1;}
		cnt=m+n-1;
		dat=new List<Tuple<int,int,int>>[cnt];
		for(int i = m-1;i<cnt;i++) {dat[i]=new List<Tuple<int,int,int>>();}
	}
	public long Get(int x1,int x2,int y1,int y2){
		int lb=-1,ub=dat[0].Count,mid=0;
		while(ub-lb>1){
			mid=(ub+lb)/2;
			if(dat[0][mid].Item1>y2){ub=mid;}
			else{lb=mid;}
		}
		int p=ub;
		lb=-1;ub=dat[0].Count;
		while(ub-lb>1){
			mid=(ub+lb)/2;
			if(dat[0][mid].Item1>=y1){ub=mid;}
			else{lb=mid;}
		}
		return Fdg(x1,x2,0,0,m-1,ub,p);
	}
	private long Fdg(int a,int b,int k,int l,int r,int la,int ra){
		if(r<a||b<l||ra==la){return 0;}
		if(a<=l&&r<=b){
			return ra-la;
		}
		else{return Fdg(a,b,k*2+1,l,(l+r)>>1,dat[k][la].Item2,dat[k][ra].Item2)+Fdg(a,b,k*2+2,(l+r+1)>>1,r,dat[k][la].Item3,dat[k][ra].Item3);}
	}
	public void Ud(int x,int y){dat[x+m-1].Add(Tuple.Create(y,-1,-1));}
	public void Dn(){
		for(int i = m-1;i<cnt;i++) {
			dat[i].Sort();
		}
		for(int i = m-2;i>=0;i--) {
			if((i<<1)+2<cnt){
				dat[i]=new List<Tuple<int,int,int>>();
				int j=0,k=0;
				while(j<dat[(i<<1)+1].Count&&k<dat[(i<<1)+2].Count){
					if(dat[(i<<1)+1][j].Item1<dat[(i<<1)+2][k].Item1){dat[i].Add(Tuple.Create(dat[(i<<1)+1][j].Item1,j,k));j++;}
					else{dat[i].Add(Tuple.Create(dat[(i<<1)+2][k].Item1,j,k));k++;}
				}
				while(j<dat[(i<<1)+1].Count){dat[i].Add(Tuple.Create(dat[(i<<1)+1][j].Item1,j,k));j++;}
				while(k<dat[(i<<1)+2].Count){dat[i].Add(Tuple.Create(dat[(i<<1)+2][k].Item1,j,k));k++;}
			}
			else if((i<<1)+1<cnt){
				dat[i]=new List<Tuple<int,int,int>>();
				for(int j = 0;j<dat[(i<<1)+1].Count;j++) {dat[i].Add(Tuple.Create(dat[(i<<1)+1][j].Item1,j,-1));}
			}
			else{dat[i]=new List<Tuple<int,int,int>>();}
		}
		for(int i = 0;i<m-1;i++) {
			if((i<<1)+2<cnt){
				dat[i].Add(Tuple.Create(int.MaxValue,dat[(i<<1)+1].Count,dat[(i<<1)+2].Count));
			}
			else if((i<<1)+1<cnt){
				dat[i].Add(Tuple.Create(int.MaxValue,dat[(i<<1)+1].Count,-1));
			}
		}
	}
}

public class Sc{
	public int I{get{return int.Parse(Console.ReadLine());}}
	public long L{get{return long.Parse(Console.ReadLine());}}
	public double D{get{return double.Parse(Console.ReadLine());}}
	public string S{get{return Console.ReadLine();}}
	public int[] Ia{get{return Array.ConvertAll(Console.ReadLine().Split(),int.Parse);}}
	public long[] La{get{return Array.ConvertAll(Console.ReadLine().Split(),long.Parse);}}
	public double[] Da{get{return Array.ConvertAll(Console.ReadLine().Split(),double.Parse);}}
	public string[] Sa{get{return Console.ReadLine().Split();}}
	public object[] Oa{get{return Console.ReadLine().Split();}}
	public int[] Ia2{get{return Array.ConvertAll(("0 "+Console.ReadLine()+" 0").Split(),int.Parse);}}
	public int[] Ia3(int a){return Array.ConvertAll((a.ToString()+" "+Console.ReadLine()).Split(),int.Parse);}
	public int[] Ia3(bool a,int b,bool c,int d){return Array.ConvertAll(((a?b.ToString()+" ":"")+Console.ReadLine()+(c?" "+d.ToString():"")).Split(),int.Parse);}
	public long[] La2{get{return Array.ConvertAll(("0 "+Console.ReadLine()+" 0").Split(),long.Parse);}}
	public long[] La3(int a){return Array.ConvertAll((a.ToString()+" "+Console.ReadLine()).Split(),long.Parse);}
	public long[] La3(bool a,int b,bool c,int d){return Array.ConvertAll(((a?b.ToString()+" ":"")+Console.ReadLine()+(c?" "+d.ToString():"")).Split(),long.Parse);}
	public T[] Arr<T>(int n,Func<T> f){var a=new T[n];for(int i=0;i<n;i++){a[i]=f();}return a;}
	public T[] Arr<T>(int n,Func<int,T> f){var a=new T[n];for(int i=0;i<n;i++){a[i]=f(i);}return a;}
	public T[] Arr<T>(int n,Func<string[],T> f){var a=new T[n];for(int i=0;i<n;i++){a[i]=f(Console.ReadLine().Split());}return a;}
	public T[] Arr<T>(int n,Func<int,string[],T> f){var a=new T[n];for(int i=0;i<n;i++){a[i]=f(i,Console.ReadLine().Split());}return a;}
}

Measured memory_bytes: 118928