http://judge.u-aizu.ac.jp/onlinejudge/description.jsp?id=1187&lang=jp

ranking.cpp

#include <algorithm>
#include <iostream>
#include <vector>


class Team {
private:
	int resolve, time;
	std::vector<int> failures;

public:
	int id;

	Team(int id, int problems) : id(id) {
		for(int i=0; i<problems; i++){
			failures.push_back(0);
		}
	}

	void check(int time, int problem, int judge) {
		if(!judge){
			this->time += time + failures[problem] * 20;
			resolve++;
		}else{
			failures[problem]++;
		}
	}

	bool operator <(const Team& x) const {
		if(resolve != x.resolve){
			return resolve > x.resolve;
		}
		if(time != x.time){
			return time < x.time;
		}
		return id > x.id;
	}

	Team& operator =(const Team& x) {
		resolve = x.resolve;
		time = x.time;
		std::copy(x.failures.begin(), x.failures.end(), std::back_inserter(failures));
		id = x.id;
		return *this;
	}

	bool operator ==(const Team& x) const {
		return resolve == x.resolve && time == x.time;
	}
};


int main() {
	while(true){
		int time_max, team_num, problem_num, num;
		std::cin >> time_max >> team_num >> problem_num >> num;

		if(time_max == 0){
			break;
		}

		std::vector<Team> teams;
		for(int i=0; i<team_num; i++){
			teams.push_back(Team(i+1, problem_num));
		}

		for(int i=0; i<num; i++){
			int time, team, problem, judge;
			std::cin >> time >> team >> problem >> judge;
			teams[team-1].check(time, problem-1, judge);
		}

		std::sort(teams.begin(), teams.end());

		auto old = *teams.begin();
		std::cout << old.id;
		for(auto itr=++teams.begin(); itr!=teams.end(); ++itr){
			std::cout << (old == *itr ? "=" : ",") << itr->id;

			old = *itr;
		}
		std::cout << std::endl;
	}
}