Submission #837398

#	Time	Username	Problem	Language	Result	Execution time	Memory
837398		KemalK	Carnival Tickets (IOI20_tickets)	C++17	27 / 100	397 ms	51320 KiB

tickets

#include "tickets.h"
#include <vector>
#include <bits/stdc++.h>
typedef long long int ll;
using namespace std;
long long find_maximum(int k, vector<std::vector<int>> x) {
	int n = x.size();
	int m = x[0].size();
	vector <vector <int>> ans(n, vector <int> (m, -1));
	ll sum = 0;
	vector <pair<ll, int>> ticket;
	for (int i = 0; i < n; i++){
		if (m > 1){
			ll cur = -x[i][0] - x[i][m - 1];
			ticket.push_back({cur, i});
		}
		else{
			ticket.push_back({-x[i][0], i});
		}
		sum += x[i][m - 1];
	}
	sort(ticket.begin(), ticket.end(), greater<pair<ll, int>>());
	for (int i = 0; i < n/2; i++){
		if (m > 1){
			sum += ticket[i].first;
		}
		else{
			sum += 2*ticket[i].first;
		}
		
		int pos = ticket[i].second;
		ans[pos][0] = 0;
	}
	for (int i = 0; i < n; i++){
		if (ans[i][0] != 0){
			ans[i][m - 1] = 0;
		}
	}
	// cout << sum << "\n";
// cout << "allocate" << "\n";

	allocate_tickets(ans);
	return sum;
}

• 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