제출 #301150

#제출 시각아이디문제언어결과실행 시간메모리
301150luciocf카니발 티켓 (IOI20_tickets)C++14
25 / 100
1028 ms63228 KiB
#include <bits/stdc++.h>
#include "tickets.h"

#define ff first
#define ss second

using namespace std;

typedef pair<int, int> pii;
typedef long long ll;

const int maxn = 1510;

int turno[maxn][maxn];

int ord[maxn];
int qtd[maxn], ptr_l[maxn], ptr_r[maxn];

ll find_maximum(int k, vector<vector<int>> x)
{
	int n = x.size();
	int m = x[0].size();

	ll ans = 0;
	for (int i = 0; i < n; i++)
		for (int j = 0; j < m; j++)
			ans -= 1ll*x[i][j];

	priority_queue<pair<int, pii>> fila;

	for (int i = 0; i < n; i++)
	{
		memset(turno[i], -1, sizeof turno[i]);

		fila.push({2*x[i][m-1], {i, m-1}});
		qtd[i] = 0, ord[i] = i;
		ptr_l[i] = 0, ptr_r[i] = m-1;
	}

	for (int t = 0; t < (n*m)/2; t++)
	{
		auto pp = fila.top(); fila.pop();

		ans += 1ll*pp.ff;
		
		if (qtd[pp.ss.ff] == m) continue;

		qtd[pp.ss.ff]++;
		fila.push({2*x[pp.ss.ff][pp.ss.ss-1], {pp.ss.ff, pp.ss.ss-1}});
	}

	for (int r = 0; r < k; r++)
	{
		sort(ord, ord+n, [&] (int a, int b) {return qtd[a] > qtd[b];});

		for (int i = 0; i < n/2; i++)
		{
			int j = ord[i];

			turno[j][ptr_r[j]] = r;
			ptr_r[j]--;
			qtd[j]--;
		}

		for (int i = n/2; i < n; i++)
		{
			int j = ord[i];

			turno[j][ptr_l[j]] = r;
			ptr_l[j]++;
		}
	}

	vector<vector<int>> S;
		
	for (int i = 0; i < n; i++)
	{
		vector<int> y;
		y.resize(m);
		
		for (int j = 0; j < m; j++)
			y[j] = turno[i][j];

		S.push_back(y);
	}

	allocate_tickets(S);
	return ans;
}
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