Submission #307145

#	Time	Username	Problem	Language	Result	Execution time	Memory
307145		Ruxandra985	Carnival Tickets (IOI20_tickets)	C++14	11 / 100	2 ms	768 KiB

tickets

#include <bits/stdc++.h>
#include "tickets.h"
#define DIMN 1510
#define MLD 1000000000

using namespace std;


pair <int , int> v[2 * DIMN];
int f[DIMN];

long long find_maximum(int k, vector<vector<int>> x) {
	int n = x.size() , i , pv , pw , elem;
	int m = x[0].size();
	long long sol = 0;
	vector<vector<int>> answer;
	for (i = 0; i < n; i++) {
		vector<int> row;
		row.resize(m , -1);
		answer.push_back(row);
	}


	if (m == 1){

        for (i = 0 ; i < n ; i++){
            answer[i][0] = 0;
            v[i] = make_pair(x[i][0] , i);
        }

        sort (v , v + n);

        for (i = 0 ; i < n ; i++){

            if (i < n / 2)
                sol = sol - v[i].first;
            else
                sol = sol + v[i].first;
        }


	}
	else if (k == 1){

        elem = 0;

        for (i = 0 ; i < n ; i++){
            v[++elem] = make_pair(x[i][0] , i + 1);
            v[++elem] = make_pair(MLD - x[i].back() , -i - 1);
        }

        sort (v + 1 , v + elem + 1);
        sol = 1LL * MLD * n / 2;

        for (i = 1 ; i <= elem ; i++){

            if (f[max(v[i].second , -v[i].second) - 1] == 0){

                sol -= v[i].first;
                if (v[i].second >= 0)
                    answer[v[i].second - 1][0] = 0;
                else answer[-v[i].second - 1][m - 1] = 0;
                f[max(v[i].second , -v[i].second) - 1] = 1;
            }

        }


	}

	allocate_tickets(answer);
	return sol;
}

Compilation message (stderr)

tickets.cpp: In function 'long long int find_maximum(int, std::vector<std::vector<int> >)':
tickets.cpp:13:25: warning: unused variable 'pv' [-Wunused-variable]
   13 |  int n = x.size() , i , pv , pw , elem;
      |                         ^~
tickets.cpp:13:30: warning: unused variable 'pw' [-Wunused-variable]
   13 |  int n = x.size() , i , pv , pw , elem;
      |                              ^~

• Subtask 1: 11 / 11
• Subtask 2: 0 / 16
• Subtask 3: 0 / 14
• Subtask 4: 0 / 14
• Subtask 5: 0 / 12
• Subtask 6: 0 / 23
• Subtask 7: 0 / 10