Submission #779345

#	Time	Username	Problem	Language	Result	Execution time	Memory
779345		Elias	Carnival Tickets (IOI20_tickets)	C++17	27 / 100	437 ms	51404 KiB

tickets

#ifndef _DEBUG
#pragma GCC optimize("O3")
#pragma GCC optimize("unroll-loops")
#endif

#include <bits/stdc++.h>

using namespace std;

#define all(x) (x).begin(), (x).end()

#ifndef _DEBUG
#include "tickets.h"
#endif

#ifdef _DEBUG
#include <vector>

long long find_maximum(int k, std::vector<std::vector<int>> d);
void allocate_tickets(std::vector<std::vector<int>> _x);
#endif

#include <vector>

long long find_maximum(int k, std::vector<std::vector<int>> x)
{
	int n = x.size();
	int m = x[0].size();
	std::vector<std::vector<int>> answer(n, vector<int>(m, -1));

	priority_queue<pair<int64_t, int>> pq;

	long long sol = 0;

	for (int i = 0; i < n; i++)
	{
		sol -= x[i][0];
		pq.push(pair<int64_t, int>{x[i].back() + x[i][0], i});
		answer[i][0] = 0;
	}

	for (int l = 0; l < n * k / 2; l++)
	{
		auto [val, i] = pq.top();
		pq.pop();

		answer[i][0] = -1;
		answer[i].back() = 0;

		sol += val;
	}

	allocate_tickets(answer);
	return sol;
}

#ifdef _DEBUG

#include <cassert>
#include <cstdio>
#include <vector>
#include <string>

static int n;
static int m;
static int k;
static std::vector<std::vector<int>> d;
static std::vector<std::vector<int>> x;
static int called = 0;

static void check(bool cond, std::string message)
{
	if (!cond)
	{
		printf("%s\n", message.c_str());
		exit(0);
	}
}

void allocate_tickets(std::vector<std::vector<int>> _d)
{
	check(!called, "allocate_tickets called more than once");
	d = _d;
	check((int)d.size() == n, "allocate_tickets called with parameter of wrong size");
	for (int i = 0; i < n; i++)
	{
		check((int)d[i].size() == m, "allocate_tickets called with parameter of wrong size");
	}
	called = 1;
}

int main()
{
	assert(scanf("%d %d %d", &n, &m, &k) == 3);
	x.resize(n);
	for (int i = 0; i < n; i++)
	{
		x[i].resize(m);
		for (int j = 0; j < m; j++)
		{
			assert(scanf("%d", &x[i][j]) == 1);
		}
	}
	fclose(stdin);

	long long answer = find_maximum(k, x);
	check(called, "failure to call allocate_tickets");
	printf("%lld\n", answer);
	for (int i = 0; i < n; i++)
	{
		for (int j = 0; j < m; j++)
		{
			if (j)
				printf(" ");
			printf("%d", d[i][j]);
		}
		printf("\n");
	}
	fclose(stdout);
	return 0;
}

#endif

• 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