Submission #1034626

#	Time	Username	Problem	Language	Result	Execution time	Memory
1034626		XXBabaProBerkay	Cyberland (APIO23_cyberland)	C++17	0 / 100	891 ms	2097152 KiB

cyberland

#include <bits/stdc++.h>
using namespace std;

#define F first
#define S second

using ll = long long;

const double INF = 1e16 + 7;

vector<vector<pair<int, double>>> adj;
vector<bool> vis;

void dfs(int k, int& H)
{
	if (k == H || vis[k])
		return;

	vis[k] = 1;

	for (auto i : adj[k])
		dfs(i.F, H);
}

double solve(int N, int M, int K, int H, vector<int> x, vector<int> y, vector<int> c, vector<int> arr)
{
	adj.resize(N);
	vis.resize(N);
	for (int i = 0; i < M; i++)
	{
		adj[x[i]].emplace_back(y[i], c[i]);
		adj[y[i]].emplace_back(x[i], c[i]);
	}

	dfs(0, H);

	vector<vector<double>> dist(K + 1, vector<double>(N, INF));

	for (int i = 0; i < N; i++)
		if (arr[i] == 0 && vis[i])
			for (int j = 0; j <= K; j++)
				dist[j][i] = 0;

	for (int i = 0; i <= K; i++)
	{
		priority_queue<pair<double, int>, vector<pair<double, int>>, greater<pair<double, int>>> PQ;
		dist[i][0] = 0;
		for (int j = 0; j < N; j++)
			if (dist[i][j] == 0)
				PQ.emplace(0, j);

		while (!PQ.empty())
		{
			int u;
			double d;
			tie(d, u) = PQ.top();
			PQ.pop();

			if (d != dist[i][u] || u == H)
				continue;

			for (auto k : adj[u])
			{
				int v;
				double w;
				tie(v, w) = k;

				bool flag = false;
				if (dist[i][v] > dist[i][u] + w)
				{
					dist[i][v] = dist[i][u] + w;
					flag = 1;
				}
				if (i > 0 && arr[v] == 2 && dist[i][v] > (dist[i - 1][u] + w) / 2.0)
				{
					dist[i][v] = min(dist[i][u] + w, (dist[i - 1][u] + w) / 2.0);
					flag = 1;
				}

				if (flag)
					PQ.emplace(dist[i][v], v);
			}
		}
	}

	return (dist[K][H] == INF ? -1 : dist[K][H]);
}

• Subtask 1: 0 / 5
• Subtask 2: 0 / 8
• Subtask 3: 0 / 13
• Subtask 4: 0 / 19
• Subtask 5: 0 / 7
• Subtask 6: 0 / 16
• Subtask 7: 0 / 29
• Subtask 8: 0 / 3