Submission #983062

#	Time	Username	Problem	Language	Result	Execution time	Memory
983062		vjudge1	Cyberland (APIO23_cyberland)	C++17	8 / 100	29 ms	5720 KiB

cyberland

#include "cyberland.h"

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

double solve(int N, int M, int K, int H, std::vector<int> x, std::vector<int> y, std::vector<int> c, std::vector<int> arr) {
    vector<vector<pair<int, int>>> g(N);
    for (int i = 0; i < M; ++i) {
		g[x[i]].emplace_back(y[i], c[i]);
		g[y[i]].emplace_back(x[i], c[i]);
	}
	vector<bool> used(N), ot(N);
	function<void(int, int)> dfs = [&](int v, int cnt) {
		assert(!used[v]);
		used[v] = true;
		for (auto [to, weight]: g[v]) {
			if (!used[to]) {
				if (arr[to] == 2 && cnt) {
					cnt--;
					ot[to] = true;
				}
				dfs(to, cnt);
			}
		}
	};
	vector<double> d(N + 1, 1e18);
	d[0] = 0;
	set<pair<double, int>> q;
	q.emplace(d[0], 0);
	while (!q.empty()) {
		int nearest = q.begin()->second;
		q.erase(q.begin());
		for (auto [to, weight]: g[nearest]) {
			double dis = d[nearest] + weight;
			if (ot[to]) dis /= 2;
			if (!arr[to]) dis = 0;
			if (d[to] > dis) {
				q.erase(pair{d[to], to});
				d[to] = dis;
				q.emplace(d[to], to);
			}
		}
	}
	return d[H];
}

• Subtask 1: 0 / 5
• Subtask 2: 8 / 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