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 int long long   // <-----!!!!!!!!!!!!!!!!!!!

#define rep(i,n) for (int i=0;i<(n);i++)
#define rep2(i,a,b) for (int i=(a);i<(b);i++)
#define rrep(i,n) for (int i=(n)-1;i>=0;i--)
#define rrep2(i,a,b) for (int i=(b)-1;i>=(a);i--)
#define all(a) (a).begin(),(a).end()

typedef long long ll;
typedef pair<int, int> P;
typedef tuple<int, int, int> TUPLE;
typedef vector<int> V;
typedef vector<V> VV;
typedef vector<VV> VVV;

signed main() {
    std::ios::sync_with_stdio(false);
    std::cin.tie(0);

    int N, M;
    while (cin >> N >> M, N) {
        VV pc(N, V(1501, 0));
        int r;
        cin >> r;
        rep(_, r) {
            int t, n, m, s;
            cin >> t >> n >> m >> s;
            n--;
            if (s == 1) {
                pc[n][t] += m;
            } else {
                pc[n][t] -= m;
            }
        }
        rep(i, N) {
            rep(j, 1500) {
                pc[i][j + 1] += pc[i][j];
            }
        }

        int q;
        cin >> q;
        rep(_, q) {
            int ts, te, m;
            cin >> ts >> te >> m;
            int ans = 0;
            rep2(t, ts, te) {
                rep(n, N) {
                    if (pc[n][t] == m) {
                        ans++;
                        break;
                    }
                }
            }
            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);
		}
	}
}

C++: //Analyzing Login/Logout Records
#include<bits/stdc++.h>
using namespace std;

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