Submission #832336

#	Time	Username	Problem	Language	Result	Execution time	Memory
832336		Johann	Carnival Tickets (IOI20_tickets)	C++14	27 / 100	660 ms	157128 KiB

tickets

#include "tickets.h"
#include "bits/stdc++.h"
using namespace std;

typedef long long ll;
typedef vector<int> vi;
typedef vector<vi> vvi;
typedef pair<int, int> pii;
typedef vector<pii> vpii;
#define sz(x) (int)(x).size()
#define all(x) (x).begin(), (x).end()

long long find_maximum(int K, std::vector<std::vector<int>> x)
{
	int N = x.size();
	int M = x[0].size();

	ll value = 0;
	vvi ans(N, vi(M, -1));
	vector<set<pii>> stuff(N);

	for (int i = 0; i < N; ++i)
		for (int j = 0; j < M; ++j)
			stuff[i].insert({x[i][j], j});

	for (int k = 0; k < K; ++k)
	{
		vpii choose;
		for (int i = 0; i < N; ++i)
			choose.push_back({stuff[i].begin()->first + stuff[i].rbegin()->first, i});

		sort(all(choose));
		for (int j = sz(choose) - 1; j >= sz(choose) / 2; --j)
		{
			int i = choose[j].second;
			value += stuff[i].rbegin()->first;
			ans[i][stuff[i].rbegin()->second] = k;
			stuff[i].erase(--stuff[i].end());
		}
		for (int j = sz(choose) / 2 - 1; j >= 0; --j)
		{
			int i = choose[j].second;
			value -= stuff[i].begin()->first;
			ans[i][stuff[i].begin()->second] = k;
			stuff[i].erase(stuff[i].begin());
		}
	}

	allocate_tickets(ans);

	return value;
}

• 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