Submission #933962

#	Time	Username	Problem	Language	Result	Execution time	Memory
933962		XXBabaProBerkay	Cyberland (APIO23_cyberland)	C++17	44 / 100	1536 ms	11088 KiB

cyberland

#include <bits/stdc++.h>
using namespace std;
 
#define F first
#define S second
 
using ll = long long;
 
const int INF = 1e9 + 7;

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

	queue<int> Q;
	vector<bool> vis(N);
	Q.push(0);
	vis[0] = 1;
	while (!Q.empty())
	{
		int u = Q.front();
		Q.pop();

		if (u == H)
			continue;

		for (auto i : adj[u])
			if (!vis[i.F])
			{
				vis[i.F] = 1;
				Q.push(i.F);
			}
	}

	priority_queue<pair<double, int>> PQ;
	vector<double> dist(N, 1e16);

	for (int i = 1; i < N; i++)
		if (arr[i] == 0 && vis[i])
		{
			dist[i] = 0;
			PQ.emplace(0, i);
		}

	dist[0] = 0;
	PQ.emplace(0, 0);
	while (!PQ.empty())
	{
		double d; int u;
		tie(d, u) = PQ.top();
		PQ.pop();

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

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

			if (dist[v] > dist[u] + w)
				PQ.emplace(dist[v] = dist[u] + w, v);
		}
	}

	for (int i = 0; i < N; i++)
	{
		if (arr[i] == 2 && vis[i])
		{
			dist[i] /= 2.0;

			double mn = 1e16;
			for (auto j : adj[i])
				if (j.F != H)
					mn = min(mn, j.S);

			if (mn < dist[i])
				for (int j = 0; j < K - 1; j++)
					dist[i] = (dist[i] + mn) / 2.0;

			PQ.emplace(dist[i], i);
		}
		else if (arr[i] == 0 && vis[i])
			PQ.emplace(0, i);
		else
			dist[i] = 1e16;
	}

	dist[0] = 0.0;
	PQ.emplace(0, 0);
	while (!PQ.empty())
	{
		int u; double d;
		tie(d, u) = PQ.top();
		PQ.pop();

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

		for (auto i : adj[u])
		{
			int v; double w;
			tie(v, w) = i;
			if (dist[v] > dist[u] + w)
				PQ.emplace(dist[v] = dist[u] + w, v);
		}
	}

	return (dist[H] == 1e16 ? -1.0 : dist[H]);
}

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