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<int>[] dat2;
	private int[][] dat01,dat02,dat03;
	private int m=1,cnt2=0;
	public Fc(int n){
		while(m<n){m<<=1;}
		cnt2=n;
		dat2=new List<int>[n];
		dat01=new int[m-1][];
		dat02=new int[m-1][];
		dat03=new int[m-1][];
		for(int i = 0;i<n;i++) {dat2[i]=new List<int>();}
	}
	public void Ud(int x,int y){dat2[x].Add(y);}
	public void Dn(){
		for(int i = 0;i<cnt2;i++) {dat2[i].Sort();}
		for(int i = 0;i<cnt2;i+=2) {
			int l=(i>>1)+(m>>1)-1;
			if(i+1<cnt2){
				dat01[l]=new int[dat2[i].Count+dat2[i+1].Count+1];
				dat02[l]=new int[dat2[i].Count+dat2[i+1].Count+1];
				dat03[l]=new int[dat2[i].Count+dat2[i+1].Count+1];
				int j=0,k=0;
				while(j<dat2[i].Count&&k<dat2[i+1].Count){
					if(dat2[i][j]<dat2[i+1][k]){
						dat01[l][j+k]=dat2[i][j];
						j++;
					}
					else{
						dat01[l][j+k]=dat2[i+1][k];
						k++;
					}
					dat02[l][j+k]=j;
					dat03[l][j+k]=k;
				}
				while(j<dat2[i].Count){
					dat01[l][j+k]=dat2[i][j];
					dat02[l][j+k]=j;
					dat03[l][j+k]=k;
					j++;
				}
				while(k<dat2[i+1].Count){
					dat01[l][j+k]=dat2[i+1][k];
					dat02[l][j+k]=j;
					dat03[l][j+k]=k;
					k++;
				}
				dat01[l][j+k]=int.MaxValue;
				dat02[l][j+k]=j;
				dat03[l][j+k]=k;
			}
			else{
				dat01[l]=new int[dat2[i].Count+1];
				dat02[l]=new int[dat2[i].Count+1];
				dat03[l]=new int[dat2[i].Count+1];
				for(int j = 0;j<dat2[i].Count;j++) {
					dat01[l][j]=dat2[i][j];
					dat02[l][j]=j;
				}
				dat01[l][dat2[i].Count]=int.MaxValue;
				dat02[l][dat2[i].Count]=dat2[i].Count;
			}
		}
		for(int i = (m>>1)-2;i>=0;i--) {
			if(dat01[(i<<1)+2]!=null){
				dat01[i]=new int[dat01[(i<<1)+1].Length+dat01[(i<<1)+2].Length-1];
				dat02[i]=new int[dat01[(i<<1)+1].Length+dat01[(i<<1)+2].Length-1];
				dat03[i]=new int[dat01[(i<<1)+1].Length+dat01[(i<<1)+2].Length-1];
				int j=0,k=0;
				while(j<dat01[(i<<1)+1].Length-1&&k<dat01[(i<<1)+2].Length-1){
					if(dat01[(i<<1)+1][j]<dat01[(i<<1)+2][k]){
						dat01[i][j+k]=dat01[(i<<1)+1][j];
						j++;
					}
					else{
						dat01[i][j+k]=dat01[(i<<1)+2][k];
						k++;
					}
					dat02[i][j+k]=j;
					dat03[i][j+k]=k;
				}
				while(j<dat01[(i<<1)+1].Length-1){
					dat01[i][j+k]=dat01[(i<<1)+1][j];
					dat02[i][j+k]=j;
					dat03[i][j+k]=k;
					j++;
				}
				while(k<dat01[(i<<1)+2].Length-1){
					dat01[i][j+k]=dat01[(i<<1)+2][k];
					dat02[i][j+k]=j;
					dat03[i][j+k]=k;
					k++;
				}
				dat01[i][j+k]=int.MaxValue;
				dat02[i][j+k]=j;
				dat03[i][j+k]=k;
			}
			else if(dat01[(i<<1)+1]!=null){
				dat01[i]=new int[dat01[(i<<1)+1].Length];
				dat02[i]=new int[dat01[(i<<1)+1].Length];
				dat03[i]=new int[dat01[(i<<1)+1].Length];
				Array.Copy(dat01[(i<<1)+1],dat01[i],dat01[i].Length-1);
				Array.Copy(dat02[(i<<1)+1],dat02[i],dat02[i].Length-1);
				Array.Copy(dat03[(i<<1)+1],dat03[i],dat03[i].Length-1);
				dat01[i][dat01[i].Length-1]=int.MaxValue;
				dat02[i][dat01[i].Length-1]=dat01[i].Length-1;
			}
			else{
				dat01[i]=new int[]{int.MaxValue};
			}
		}
	}
	public long Get(int x1,int x2,int y1,int y2){
		int lb=-1,ub=dat01[0].Length,mid=0;
		while(ub-lb>1){
			mid=(ub+lb)>>1;
			if(dat01[0][mid]>y2){ub=mid;}
			else{lb=mid;}
		}
		int p=ub;
		lb=-1;ub=dat01[0].Length;
		while(ub-lb>1){
			mid=(ub+lb)>>1;
			if(dat01[0][mid]>=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,dat02[k][la],dat02[k][ra])+Fdg(a,b,k*2+2,(l+r+1)>>1,r,dat03[k][la],dat03[k][ra]);}
	}
}

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: 43904