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 <cstdio>
#include <vector>
#include <set>
using namespace std;

int main(){
    int N,M,r,q,t,n,m,s,i,j,k;
    while(1){
        scanf("%d",&N);
        scanf("%d",&M);
        if(!N && !M){break;}
        scanf("%d",&r);
        vector< vector<int> > datas(N);
        for(i=0;i<r;i++){
            scanf("%d",&t);
            scanf("%d",&n);
            scanf("%d",&m);
            scanf("%d",&s);
            datas[n-1].push_back(t+10000*m);
        }
        int ts,te,mm;
        scanf("%d",&q);
        for(k=0;k<q;k++){
            scanf("%d",&ts);
            scanf("%d",&te);
            scanf("%d",&mm);

            vector<int> cd;
            for(i=0;i<N;i++){
                for(auto itr=datas[i].begin();itr!=datas[i].end();itr++){
                    if(*itr/10000==mm){cd.push_back(*itr%10000);}
                }
            }
            set<int> bset;
            for(i=0;i!=cd.size();i+=2){
                for(j=cd[i];j<=cd[i+1];j++){
                    bset.insert(j);
                }
            }
            int cnt=0,bf=0;
            for(auto itr=bset.begin();itr!=bset.end();++itr){
                if(ts<=*itr&&te>=*itr){
                    if(*itr-bf==1){
                        cnt++;
                    }
                    bf=*itr;
                }
            }
            printf("%d\n",cnt);
        }
    }
    return 0;
}

C++: #include <iostream>

using namespace std;

int main(){

	int n,m;
	int r;
	int q;

	//int student[10000][800];



	int **student = new int*[1005];
	for(int i=0;i<1005;i++){
		student[i] = new int[800];
	}


	int *realToImage;
	realToImage = new int[10005];

	int *imageToReal;
	imageToReal = new int[2000];

	while(cin>>n>>m){
		if(n==0&&m==0)break;

		int studentNum=0;

		for(int i=0;i<2000;i++){
			imageToReal[i]=-1;
		}

		for(int i=0;i<10005;i++){
			realToImage[i]=-1;
		}

		for(int i=0;i<1005;i++){
			for(int j=0;j<800;j++){
				student[i][j]=0;
				
			}
		}
		//cout<<"unko"<<endl;
		cin>>r;

		for(int i=0;i<r;i++){
			int tmpT,tmpN,tmpM,tmpS;
			cin>>tmpT>>tmpN>>tmpM>>tmpS;

			if(realToImage[tmpM]==-1){
				realToImage[tmpM]=studentNum;
				imageToReal[studentNum]=tmpM;
				studentNum++;
			}

			int image=realToImage[tmpM];
			if(tmpS==1){
				student[image][tmpT-540]++;
			}
			else{
				student[image][tmpT-540]--;
			}
		}

		for(int i=0;i<1005;i++){
			int num=0;
			for(int j=0;j<800;j++){
				if(student[i][j]==1){
					num++;
				}
				else if(student[i][j]==-1){
					num--;
				}
				student[i][j]=num;
			}
		}

		cin>>q;

		for(int i=0;i<q;i++){
			int start,end,studentM;
			cin>>start>>end>>studentM;
			start-=540;
			end-=540;

			int cnt=0;

			if(realToImage[studentM]==-1){
				cout<<0<<endl;
				continue;
			}

			int ansImage=realToImage[studentM];

			for(int j=start;j<end;j++){
				if(student[ansImage][j]>0){
					cnt++;
				}
			}

			cout<<cnt<<endl;
		}


	}

	return 0;


}

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

int main()
{
loop:
  int min = 1 << 30, max = 0, sum = 0, n;
  cin >> n;
  if(!n)
    return 0;
  for(int i = 0; i < n; i++)
  {
    int tmp;
    cin >> tmp;
    max = max < tmp ? tmp : max;
    min = min > tmp ? tmp : min;
    sum += tmp;
  }
  cout << (sum - max - min) / (n - 2) << endl;
  goto loop;
}

C++: ///
// File:  1148.cpp
// Author: ymiyamoto
//
// Created on Fri Nov 17 00:20:41 2017
//

#include <cstdint>
#include <iostream>
#include <stack>
#include <vector>

using namespace std;

int32_t main()
{
  while (true) {
    uint32_t N, M;
    cin >> N >> M;
    if (N == 0 && M == 0) break;

    vector<stack<uint32_t>> stacks(M + 1);
    vector<vector<pair<uint32_t, uint32_t>>> used(M + 1);
    uint32_t r;
    cin >> r;
    for (uint32_t _ = 0; _ < r; _++) {
      uint32_t t, n, m, s;
      cin >> t >> n >> m >> s;
      if (s == 0) {
        if (stacks[m].empty()) {
          cerr << t << n << m << s;
          exit(1);
        }
        uint32_t start_time = stacks[m].top();
        stacks[m].pop();
        if (stacks[m].empty()) {
          used[m].push_back({start_time, t});
        }
      } else {
        stacks[m].push(t);
      }
    }

    uint32_t q;
    cin >> q;
    for (uint32_t _ = 0; _ < q; _++) {
      uint32_t s, e, m;
      cin >> s >> e >> m;
      uint32_t count = 0;
      for (auto iter = used[m].begin(); iter < used[m].end(); iter++) {
        uint32_t start = iter->first;
        uint32_t end = iter->second;
        if (start < s && e < end) {
          count += e - s;
        } else if (start < s && s < end && end < e) {
          count += end - s;
        } else if (s < start && start < e && e < end) {
          count += e - start;
        } else if (s <= start && end <= e) {
          count += end - start;
        }
      }
      cout << count << endl;
    }
  }
  return 0;
}