Submission #794168

#	Time	Username	Problem	Language	Result	Execution time	Memory
794168		Johann	Dungeons Game (IOI21_dungeons)	C++17	25 / 100	3591 ms	2097152 KiB

dungeons

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

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

int N;
const ll INF = 1LL << 60;
vi S, P;
vi Svalues;
vector<int> W, L;
vi dpWin;
vvvpii dpLos;

void init(int n, std::vector<int> s, std::vector<int> p, std::vector<int> w, std::vector<int> l)
{
	N = n;
	S.resize(N), P.resize(N);
	W = w, L = l;
	for (int i = 0; i < N; ++i)
		S[i] = s[i], P[i] = p[i];

	set<int> shelper(all(S));
	Svalues = vi(all(shelper));

	dpWin.assign(N + 1, INF);
	dpWin[N] = 0;
	for (int i = N - 1; i >= 0; --i)
		dpWin[i] = S[i] + dpWin[W[i]];

	dpLos.resize(sz(Svalues)); // assuming not having reached Svalues[i]

	for (int ii = 0; ii < sz(Svalues); ++ii)
	{
		dpLos[ii] = vvpii(N, vpii(ceil(log2(Svalues[ii]) + 1)));
		for (int i = 0; i < N; ++i)
			if (S[i] >= Svalues[ii])
				dpLos[ii][i][0] = {L[i], P[i]};
			else
				dpLos[ii][i][0] = {W[i], S[i]};

		for (int j = 1; j < sz(dpLos[ii].back()); ++j)
			for (int i = 0; i < N; ++i)
			{
				int mid = dpLos[ii][i][j - 1].first;
				if (mid == N)
					dpLos[ii][i][j] = dpLos[ii][i][j - 1];
				else
					dpLos[ii][i][j] = {dpLos[ii][mid][j - 1].first, dpLos[ii][mid][j - 1].second + dpLos[ii][i][j - 1].second};
			}
	}

	return;
}

long long simulate(int x, int z)
{
	ll ans = z;
	for (int ii = 0; ii < sz(Svalues); ++ii)
	{
		if (ans >= Svalues[ii])
			continue;

		for (int j = sz(dpLos[ii].back()) - 1; j >= 0 && x != N; --j)
		{
			if (dpLos[ii][x][j].second + ans < Svalues[ii])
			{
				ans += dpLos[ii][x][j].second;
				x = dpLos[ii][x][j].first;
			}
		}

		if (ans < Svalues[ii] && x != N)
		{
			ans += dpLos[ii][x][0].second;
			x = dpLos[ii][x][0].first;
		}
	}

	return ans + dpWin[x];
}

• Subtask 1: 0 / 11
• Subtask 2: 0 / 26
• Subtask 3: 13 / 13
• Subtask 4: 12 / 12
• Subtask 5: 0 / 27
• Subtask 6: 0 / 11