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)
}

Python: l = (1260-540)+1
while True:
	N,M = map(int,input().split(" "))
	if N == 0 and M == 0:
		break
	T = [[0]*l for _ in range(M)]
	r = int(input())
	for i in range(r):
		t,n,m,s = map(int,input().split(" "))
		if s == 1:
			T[m-1][t-540] += 1
		else:
			T[m-1][t-540] -= 1

	q = int(input())
	used = {}
	for i in range(q):
		t1,t2,m = map(int,input().split(" "))
		if not (m-1) in used:
			T_range = []
			flg = True if T[m-1][0] >= 1 else False
			lb = 0
			for j in range(l-1):
				T[m-1][j+1] += T[m-1][j]
				if flg and T[m-1][j+1] == 0:
					T_range.append((lb+540,j+1+540))
					flg = False
				elif (not flg) and T[m-1][j+1] >= 1:
					flg = True
					lb = (j+1)
			if flg:
				T_range.append((lb+540,1261))
			used[m-1] = T_range

		ans = 0
		for a,b in used[m-1]:
			if not (b < t1 or t2 < a):
				ans += (min(t2,b) - max(t1,a))

		print(ans)

Python: #!/usr/bin/env python
# -*- coding: utf-8 -*-

while True:
    N,M = map(int,input().split())
    if N == 0 and M == 0:
        break
    r = int(input())
    user = [[0 for i in range(1260+1)] for j in range(M+1)]
    for i in range(r):
        t,n,m,s = map(int,input().split())
        if s == 1:
            user[m][t] += 1
        else:
            user[m][t] -= 1

    q = int(input())
    for i in range(q):
        ts,te,m = map(int,input().split())
        if user[m][0] == 0:
            for j in range(540,1261):
                user[m][j] += user[m][j-1]
            user[m][0] = 1
        print(sum([1 for j in range(ts,te) if user[m][j] > 0]))