Go: package main

import (
	"bufio"
	"fmt"
	"os"
	"strconv"
	"strings"
)

func main() {
	io := NewIo()
	defer io.Flush()
	for {
		_, M := io.NextInt(), io.NextInt()
		if M == 0 {
			break
		}
		r := io.NextInt()
		t, m, s := make([]int, r), make([]int, r), make([]int, r)
		for i := 0; i < r; i++ {
			t[i], _, m[i], s[i] = io.NextInt(), io.NextInt(), io.NextInt()-1, io.NextInt()
		}
		q := io.NextInt()
		for i := 0; i < q; i++ {
			ss, ee, mm := io.NextInt(), io.NextInt(), io.NextInt()-1
			x := make([]int, 1300)
			for j := 0; j < r; j++ {
				if m[j] == mm {
					if s[j] == 1 {
						x[t[j]]++
					} else {
						x[t[j]]--
					}
				}
			}
			for j := 1; j < 1300; j++ {
				x[j] = x[j] + x[j-1]
			}
			ans := 0
			for j := ss; j < ee; j++ {
				if x[j] > 0 {
					ans++
				}
			}
			io.Println(ans)
		}
	}
}

// I/O template
type Io struct {
	reader    *bufio.Reader
	writer    *bufio.Writer
	tokens    []string
	nextToken int
}

func NewIo() *Io {
	return &Io{
		reader: bufio.NewReader(os.Stdin),
		writer: bufio.NewWriter(os.Stdout),
	}
}

func (io *Io) Flush() {
	err := io.writer.Flush()
	if err != nil {
		panic(err)
	}
}

func (io *Io) NextLine() string {
	var buff []byte
	for {
		line, isPrefix, err := io.reader.ReadLine()
		if err != nil {
			panic(err)
		}
		buff = append(buff, line...)
		if !isPrefix {
			break
		}
	}
	return string(buff)
}

func (io *Io) Next() string {
	for io.nextToken >= len(io.tokens) {
		line := io.NextLine()
		io.tokens = strings.Fields(line)
		io.nextToken = 0
	}
	s := io.tokens[io.nextToken]
	io.nextToken++
	return s
}

func (io *Io) NextInt() int {
	i, err := strconv.Atoi(io.Next())
	if err != nil {
		panic(err)
	}
	return i
}

func (io *Io) NextFloat() float64 {
	i, err := strconv.ParseFloat(io.Next(), 64)
	if err != nil {
		panic(err)
	}
	return i
}

func (io *Io) Println(a ...interface{}) {
	fmt.Fprintln(io.writer, a...)
}

func (io *Io) Printf(format string, a ...interface{}) {
	fmt.Fprintf(io.writer, format, a...)
}

func (io *Io) PrintIntSlice(a []int) {
	b := []interface{}{}
	for _, x := range a {
		b = append(b, x)
	}
	io.Println(b...)
}

func (io *Io) PrintStringSlice(a []string) {
	b := []interface{}{}
	for _, x := range a {
		b = append(b, x)
	}
	io.Println(b...)
}

func Log(name string, value interface{}) {
	fmt.Fprintf(os.Stderr, "%s=%+v\n", name, value)
}

func ExampleIo() {
	io := NewIo()
	defer io.Flush()
	a := make([]int, 0, 3)
	a[0], a[1], a[2] = io.NextInt(), io.NextInt(), io.NextInt()
	io.Println(a)
	io.PrintIntSlice(a)
	Log("io", a)
}

C++: #include<bits/stdc++.h>
using namespace std;
#define inf 1e9
#define ll long long
#define ull unsigned long long
#define M 1000000007
#define P pair<int,int>
#define PLL pair<ll,ll>
#define FOR(i,m,n) for(int i=m;i<n;i++)
#define RFOR(i,m,n) for(int i=m;i>=n;i--)
#define rep(i,n) FOR(i,0,n)
#define rrep(i,n) RFOR(i,n,0)
#define all(a) a.begin(),a.end()
const int vx[4] = {0,1,0,-1};
const int vy[4] = {1,0,-1,0};
#define PI 3.14159265


void f(int n,int m){
  int v[1300][1100]={};

  int r;
  cin>>r;
  rep(i,r){
    int a,b,c,d;
    cin>>a>>b>>c>>d;
    if(d==1){
      v[c][a]++;
    }
    if(d==0){
      v[c][a]--;
    }
  }

  rep(i,1300){
    FOR(j,540,1100){
      v[i][j]+=v[i][j-1];
    }
    FOR(j,540,1100){
      v[i][j]=(v[i][j]>0);
    }
    FOR(j,540,1100){
      v[i][j]+=v[i][j-1];
    }
  }


  int q;
  cin>>q;
  rep(i,q){
    int a,b,c;
    cin>>a>>b>>c;
    cout<<v[c][b-1]-v[c][a-1]<<endl;
  }

}


int main(){
  while(1){
    int n,m;
    cin>>n>>m;
    if(n==0) break;
    f(n,m);
  }

  return 0;
}

C++: #include<iostream>
#include<cstring>
using namespace std;

int main(){
  int N,M;
  while(cin>>N>>M){
    if(N==0)break;
    int r,q;
    int student[M][721];
    memset(student,0,sizeof(student));  
    cin>>r;
    int m;
    for(int i=0;i<r;i++){
      int t,n,s;
      cin>>t>>n>>m>>s;
      t-=540;m--;
      if(s==1){
	student[m][t]=n;
      }else{
	while(t>0 && student[m][--t]!=n)
	  if(student[m][t]==0) student[m][t]=n;
      }
    }
    cin>>q;
    for(int i=0;i<q;i++){
      int ts,te;
      cin>>ts>>te>>m;
      ts-=540;te-=540;m--;
      int ans=0;
      for(int i=ts;i<te;i++){
	if(student[m][i]>0)ans++;
      }
      cout << ans << endl;
    }
  }
  return 0;
}

C++: #include<iostream>

using namespace std;

#define NMAX 200
#define NOT 10000

int time[10001][1261];

int main(){

	while(1){
		int N,M,r,q;
		int t,n,m,s;
		int ts,te;

		cin>>N>>M;

		if(N==0&&M==0) break;

		cin>>r;
		for(int i=0;i<=M;i++){
			for(int j=0;j<=1260;j++){
				time[i][j]=0;
			}
		}
		for(int i=0;i<r;i++){
			cin>>t>>n>>m>>s;
			if(s==0) time[m][t]--;
			if(s==1) time[m][t]++;
		}
		for(int i=0;i<=M;i++){
			for(int j=1;j<=1260;j++){
				time[i][j]+=time[i][j-1];
			}
		}
		cin>>q;
		for(int i=0;i<q;i++){
			cin>>ts>>te>>m;
			int ans=0;
			for(int j=ts;j<te;j++){
				if(time[m][j]!=0) ans++;
			}
			cout<<ans<<endl;
		}
	}
}

C++: ////////////////////////////////////////
///  tu3 pro-con template            ///
////////////////////////////////////////
#include <cassert>
#include <cstdio>
#include <cstring>
#include <cmath>
#include <iostream>
#include <sstream>
#include <algorithm>
#include <numeric>
#include <functional>
#include <vector>
#include <queue>
#include <string>
#include <complex>
#include <stack>
#include <set>
#include <map>
#include <list>
#include <unordered_map>
#include <unordered_set>
#include <bitset>
#include <regex>
using namespace std;

//// MACRO ////
#define countof(a) (sizeof(a)/sizeof(a[0]))

#define REP(i,n) for (int i = 0; i < (n); i++)
#define RREP(i,n) for (int i = (n)-1; i >= 0; i--)
#define FOR(i,s,n) for (int i = (s); i < (n); i++)
#define RFOR(i,s,n) for (int i = (n)-1; i >= (s); i--)
#define pos(c,i) c.being() + (i)
#define allof(c) c.begin(), c.end()
#define aallof(a) a, countof(a)
#define partof(c,i,n) c.begin() + (i), c.begin() + (i) + (n)
#define apartof(a,i,n) a + (i), a + (i) + (n)
#define long long long

#define EPS 1e-9
#define INF (1L << 30)
#define LINF (1LL << 60)

//// i/o helper ////

struct _Reader { template <class T> _Reader operator ,(T &rhs) { cin >> rhs; return *this; } };
struct _Writer { bool f; _Writer() : f(false) { } template <class T> _Writer operator ,(const T &rhs) { cout << (f ? " " : "") << rhs; f = true; return *this; } };
#define READ(t,...) t __VA_ARGS__; _Reader(), __VA_ARGS__
#define WRITE(...) _Writer(), __VA_ARGS__; cout << endl

//// start up ////
void solve();
int main()
{
	solve();
	return 0;
}

////////////////////
/// template end ///
////////////////////

void solve()
{
	int testcases = INF;
	REP(testcase, testcases)
	{
		READ(int, N, M);
		if (!(N | M)) { break; }
		READ(int, r);
		struct entry { int t, n, m, s; };
		vector<entry> log;
		REP(i, r)
		{
			READ(int, t, n, m, s);
			log.push_back({ t, n, m, s });
		}

		READ(int, q);
		REP(i, q)
		{
			int ret = 0;

			READ(int, ts, te, m);
			int stack = 0, first;
			for (entry e : log)
			{
				if (e.m == m)
				{
					if (e.s) { if (!stack) { first = e.t; } stack++; }
					else { stack--; if (!stack) { ret += max(0, min(e.t, te) - max(first, ts)); } }
				}
			}
			WRITE(ret);
		}
	}
}