Submission #464499

#	Time	Username	Problem	Language	Result	Execution time	Memory
464499		armand	Carnival Tickets (IOI20_tickets)	C++14	27 / 100	620 ms	73104 KiB

tickets

#include "tickets.h"
#include <vector>
#include <algorithm>
using namespace std;

long long find_maximum(int k, std::vector<std::vector<int>> x) {
	int n = x.size();
	int m = x[0].size();
	int i, j;
	long long res = 0;
	std::vector<std::vector<int>> answer;
	vector<pair<int, int> > a(n);
	vector<int> min_index(n), max_index(n);
	for (i = 0; i < n; i++) {
		min_index[i] = 0;
		max_index[i] = m-1;
	}
	for (i = 0; i < n; i++) {
		std::vector<int> row(m, -1);
		answer.push_back(row);
	}
	for (i = 0; i < n; i++) {
		a[i].first = x[i][max_index[i]] + x[i][min_index[i]];
		a[i].second = i;
		res -= x[i][min_index[i]];
	}
	sort(a.begin(), a.end());
	for (i = 0; i < n / 2; i++)
		answer[a[i].second][min_index[a[i].second]] = 0;
	for (i = n / 2; i < n; i++) {
		answer[a[i].second][max_index[a[i].second]] = 0;
		res += a[i].first;
	}
	allocate_tickets(answer);
	return res;
}

Compilation message (stderr)

tickets.cpp: In function 'long long int find_maximum(int, std::vector<std::vector<int> >)':
tickets.cpp:9:9: warning: unused variable 'j' [-Wunused-variable]
    9 |  int i, j;
      |         ^

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