oj.uz

Submission #380210

# Submission time Handle Problem Language Result Execution time Memory
380210 2021-03-20T14:02:26 Z peijar Semiexpress (JOI17_semiexpress) C++17
0 / 100
 1 ms 364 KB 
#include <bits/stdc++.h>
#define int long long
using namespace std;

int nbStations, nbExpress, nbSemi;
int tempsLocal, tempsExpress, tempsSemiExpress, tempsMax;

struct Situation
{
	int tempsRestant, emplacementsRestant;

	Situation(int a, int b) : tempsRestant(a), emplacementsRestant(b) {}

	int peutPrendre(void) const
	{
		return min(emplacementsRestant, 1 + tempsRestant / tempsLocal);
	}

	Situation prend(void) const
	{
		int nbPris = peutPrendre();
		return {tempsRestant - tempsSemiExpress * nbPris, emplacementsRestant - nbPris};
	}

	bool operator<(Situation other) const
	{
		return peutPrendre() < other.peutPrendre();
	}
};

signed main(void)
{
	ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0);

	cin >> nbStations >> nbExpress >> nbSemi;
	cin >> tempsLocal >> tempsExpress >> tempsSemiExpress >> tempsMax;

	vector<int> posExpress(nbExpress);
	for (auto &v : posExpress)
		cin >> v;

	priority_queue<Situation> pq;
	int maxAtteint(0);

	for (int iStation = 0; iStation < nbExpress-1; ++iStation) 
	{
		int tempsRestant = tempsMax - (posExpress[iStation] - 1) * tempsExpress;
		if (tempsRestant < 0) continue;
		int nbAtteint = min(posExpress[iStation+1] - posExpress[iStation],
				1 + tempsRestant / tempsLocal);
		//cout << iStation << ' ' << nbAtteint << endl;
		maxAtteint += nbAtteint;
		tempsRestant -= tempsSemiExpress * nbAtteint;
		//cout << tempsRestant << ' ' << posExpress[iStation+1] - posExpress[iStation] - nbAtteint << endl;
		if (tempsRestant >= 0)
			pq.emplace(tempsRestant, posExpress[iStation+1]-posExpress[iStation] - nbAtteint);
	}

	for (int iter(0); iter < nbSemi - nbExpress and !pq.empty(); ++iter)
	{
		auto curSituation = pq.top(); pq.pop();
		if (!curSituation.emplacementsRestant) continue;
		int nbPris = curSituation.peutPrendre();
		maxAtteint += nbPris;
		auto nxtSituation = curSituation.prend();
		if (nxtSituation.tempsRestant > 0)
			pq.push(nxtSituation);
	}

	if (tempsExpress * nbStations <= tempsMax)
		maxAtteint++;

	cout << maxAtteint - 1<< endl;
}

Subtask #1
0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 1 ms 364 KB Output is correct
7 Incorrect 1 ms 364 KB Output isn't correct
8 Halted 0 ms 0 KB -

Subtask #2
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 1 ms 364 KB Output is correct
7 Incorrect 1 ms 364 KB Output isn't correct
8 Halted 0 ms 0 KB -

Subtask #3
0 / 52.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 1 ms 364 KB Output is correct
7 Incorrect 1 ms 364 KB Output isn't correct
8 Halted 0 ms 0 KB -