Submission #543541

#	Time	Username	Problem	Language	Result	Execution time	Memory
543541		sliviu	Carnival Tickets (IOI20_tickets)	C++17	100 / 100	692 ms	59552 KiB

tickets

#include <bits/stdc++.h>
#include <tickets.h>
 
using namespace std;
using ll = long long;
 
ll find_maximum(int k, vector<vector<int>> x) {
	int n = x.size(), m = x[0].size();
	ll ans = 0;
	vector<int> pos(n, k - 1);
	vector<vector<int>> sol(n, vector<int>(m, -1));
	priority_queue<pair<int, int>> PQ;
	for (int i = 0; i < n; ++i) {
		for (int j = 0; j < k; ++j)
			ans -= x[i][j];
		PQ.emplace(x[i][k - 1] + x[i][m - 1], i);
	}
	for (int i = 0; i < n * k / 2; ++i) {
		auto [s, j] = PQ.top();
		PQ.pop();
		ans += s;
		if (--pos[j] >= 0)
			PQ.emplace(x[j][pos[j]] + x[j][m - k + pos[j]], j);
	}
	for (int i = 0, l = 0, r = k - 1; i < n; ++i) {
		for (int j = 0; j <= pos[i]; ++j)
			sol[i][j] = l, l = (l + 1) % k;
		for (int j = m - 1; j > m - k + pos[i]; --j)
			sol[i][j] = r, r = (r - 1 + k) % k;
	}
	allocate_tickets(sol);
	return ans;
}

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