Go: package main

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

func main() {
	io := NewIo()
	defer io.Flush()
	for {
		M, T, P, R := io.NextInt(), io.NextInt(), io.NextInt(), io.NextInt()
		if M == 0 {
			break
		}
		score := make([]struct{ num, time, index int }, T)
		submit := make([][]int, T)
		for i := 0; i < T; i++ {
			score[i].index = i + 1
			submit[i] = make([]int, P)
		}

		for i := 0; i < R; i++ {
			m, t, p, j := io.NextInt(), io.NextInt()-1, io.NextInt()-1, io.NextInt()
			if j == 0 {
				score[t].num++
				score[t].time += submit[t][p]*20 + m
			} else {
				submit[t][p]++
			}
		}
		sort.SliceStable(score, func(i, j int) bool {
			return score[i].num < score[j].num || score[i].num == score[j].num && score[i].time > score[j].time
		})

		for i := T - 1; i > 0; i-- {
			io.Printf("%d", score[i].index)
			if score[i].num == score[i-1].num && score[i].time == score[i-1].time {
				io.Printf("=")
			} else {
				io.Printf(",")
			}
		}
		io.Println(score[0].index)
	}
}

// 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++: #define _USE_MATH_DEFINES 
#include <iomanip> 
#include <cmath>  
#include<iostream>
#include <fstream>
#include<vector>
#include<algorithm>
#include<bitset>
#include<map>
#include<queue>
#include<stack>
using namespace std;
typedef long long ll;
#define repi(i,a,b) for(ll i = (ll)(a) ; i < (ll)(b) ; i++)
#define repd(i,a,b) for(ll i = (ll)(a) ; i > (ll)(b) ; i--)
#define rd(x) cin >> x
#define wr(x)  cout << x
#define wrln(x) cout << x << endl

int M, T, P, R;

int main() {
	struct team {
		int number, point, time;
		bool operator<(const team& right) const {
			// ポイントは大きい方が↑、同じなら時間小さい方が↑；さらに番号大きい順だった。。。（ｙｋｙｍ）
			if (point == right.point && time == right.time) return number < right.number;
			return point == right.point ? time > right.time : point < right.point;
		}
	};
	while (1) {
		cin >> M >> T >> P >> R;
		if (M == 0 && T == 0 && P == 0 && R == 0) break;
		vector<team> teams;
		team ttemp;
		repi(i, 0, T) {
			team t;
			t.number = i, t.point = 0, t.time = 0;
			teams.push_back(t);
		}
		int mi, ti, pi, ji;//経過時間、チーム番号、問題番号、ジャッジの種類
		int timetemps[51][11] = {};//[チーム番号][問題番号]
		repi(i, 0, R) {
			cin >> mi >> ti >> pi >> ji;
			if (ji == 0) {
				//正解
				teams[ti - 1].point++;
				teams[ti - 1].time += (timetemps[ti - 1][pi] + mi);
			}
			else {
				//不正解
				timetemps[ti-1][pi] += 20;
			}
		}
		sort(teams.begin(), teams.end());
		reverse(teams.begin(), teams.end());
		repi(i, 0, teams.size()) {
			if (i > 0) {
				if (teams[i].point == teams[i - 1].point && teams[i].time == teams[i - 1].time) {
					wr("=");
				}
				else {
					wr(",");
				}
			}
			wr(teams[i].number + 1);
		}
		cout << endl;
	}
	return 0;
}

C++: #include<iostream>
#include<algorithm>
using namespace std;
int main() {
	int m, t, p, r;
	while (cin >> m >> t >> p >> r, m) {
		pair<pair<int, int>, pair<int, int>>log[2014];
		//time team problem result
		for (int i = 0; i < r; i++) 
			cin >> log[i].first.first >> log[i].first.second >> log[i].second.first >> log[i].second.second;
		sort(log, log + r);
		pair<pair<int, int>, int>point[60];
		//problems penalty teamnum
		int penalty[60][15] = {};
		for (int i = 1; i <= t; i++) {
			point[i].first.first = 15;
			point[i].first.second = 0;
			point[i].second = i;
		}
		for (int i = 0; i < r; i++) {
			if (log[i].second.second) {
				//WRONG ANSWER
				penalty[log[i].first.second][log[i].second.first]++;
			}
			else{
				//ACCEPTED
				point[log[i].first.second].first.first--;
				point[log[i].first.second].first.second += penalty[log[i].first.second][log[i].second.first] * 20 + log[i].first.first;
			}
		}
		for (int i = 1; i < t; i++) {
			for (int j = i + 1; j <= t; j++) {
				if (point[i].first > point[j].first)swap(point[i], point[j]);
				else if (point[i].first == point[j].first)if (point[i].second < point[j].second)swap(point[i], point[j]);
			}
		}
		cout << point[1].second;
		for (int i = 2; i <= t; i++) {
			if (point[i].first == point[i - 1].first)cout << '=';
			else cout << ',';
			cout << point[i].second;
		}
		cout << endl;
	}
}

C++: #include <bits/stdc++.h>
#define rep(i,n) for(int i=0;i<n;i++)
using namespace std;

int m,t,p,r,a[50][10];
pair<pair<int,int>,int> b[50];

int main(){
	while(cin>>m>>t>>p>>r,m||t||p||r){
		memset(a,0,sizeof(a));
		memset(b,0,sizeof(b));
		rep(i,r){
			int M,T,P,R;cin>>M>>T>>P>>R;T--;P--;
			if(R) a[T][P]++;
			else b[T].first.first--,b[T].first.second+=a[T][P]*20+M;
		}
		rep(i,t)b[i].second-=i+1;
		sort(b,b+t);
		rep(i,t){
			if(i) cout<<(b[i].first==b[i-1].first?'=':',');
			cout<<-b[i].second;
		}
		cout<<endl;
	}
}