Submission #1063070

#	Time	Username	Problem	Language	Result	Execution time	Memory
1063070		jamjanek	Carnival Tickets (IOI20_tickets)	C++14	27 / 100	348 ms	73404 KiB

tickets

#include "tickets.h"
#include <bits/stdc++.h>
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;

	vector<vector<int>>answer = x;
	for(i=0;i<n;i++)
		for(j=0;j<m;j++)
			answer[i][j] = -1;

	long long wynik = 0;
	priority_queue<pair<long long, pair<int, int>>>kolejka;
	vector<set<int>>dodatnie(n), ujemne(n);

	for(i=0;i<n;i++){
		for(j=m-k;j<m;j++){
			wynik+=x[i][j];
			dodatnie[i].insert(j);
		}
		kolejka.push({-(long long)x[i][m-k]-x[i][0], {i, 0}});
	}
//	int dl = m-k;
	for(int minus=0;minus<k*n/2;minus++){
		i = kolejka.top().second.first;
		j = kolejka.top().second.second;
		wynik+=kolejka.top().first;
		kolejka.pop();
		ujemne[i].insert(j);
		dodatnie[i].erase(j+m-k);
		j++;
		if(j<k)
			kolejka.push({-(long long)x[i][m-k+j]-x[i][j], {i,j}});
	}
//	exit(0);
	//0011111
	 //1111100
	int bilans = 0;
	for(i=0;i<k;i++){
		for(j=0;j<n;j++){
			if(dodatnie[j].size()>ujemne[j].size() || (dodatnie[j].size()==ujemne[j].size() && bilans>=0)){
				auto it = *dodatnie[j].begin();
				answer[j][it] = i;
				bilans++;
				dodatnie[j].erase(it);
			}
			else{
				auto it = *ujemne[j].begin();
				answer[j][it] = i;
				bilans--;
				ujemne[j].erase(it);				
			}
		}
	}
	

	allocate_tickets(answer);
	return wynik;
	
}

• 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