제출 #990481

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
990481		OAleksa	사이버랜드 (APIO23_cyberland)	C++17	0 / 100	2075 ms	26328 KiB

cyberland

#include "cyberland.h"
#include <bits/stdc++.h>
#define f first
#define s second
using namespace std;
//g++ cyberland.cpp cyberland.h stub.cpp
const int N = 1e5 + 69;
const long long inf = 1e18;
vector<pair<int, int>> g[N];
double dis[N][33];
int vis[N];
void dfs(int v) {
	if (vis[v])
		return;
	vis[v] = 1;
	for (auto u : g[v]) 
		dfs(u.f);
}
double solve(int n, int m, int k, int s, vector<int> x, vector<int> y, vector<int> c, vector<int> a) {
	//reset
	for (int i = 0;i < n;i++) {
		g[i].clear();
		vis[i] = 0;
	}
	for (int i = 0;i < m;i++) {
		g[x[i]].push_back({y[i], c[i]});
		g[y[i]].push_back({x[i], c[i]});
	}
	dfs(0);
	if (!vis[s])
		return -1;
	for (int i = 0;i < n;i++) {
		for (int j = 0;j <= k;j++)
			dis[i][j] = inf;
	}
	dis[s][0] = 0;
	priority_queue<tuple<double, int, int>> pq;
	pq.push({0, 0, 0});
	for (int i = 1;i < n;i++) {
		if (a[i] == 0) {
			dis[i][0] = 0;
			pq.push({0, i, 0});
		}
	}
	while (!pq.empty()) {
		auto x = pq.top();
		pq.pop();
		int v, j;
		double d;
		tie(d, v, j) = x;
		d = abs(d);
		for (auto u : g[v]) {
			if (a[u.f] == 0)
				continue;
			if (dis[u.f][j] < d + u.s) {
				dis[u.f][j] = d + u.s;
				pq.push({-dis[u.f][j], u.f, j});
			}
			if (a[v] == 2) {
				if (j < k && dis[u.f][j + 1] < (d + u.s) / 2) {
					dis[u.f][j] = (d + u.s) / 2;
					pq.push({-dis[u.f][j + 1], u.f, j + 1});
				}
			}
		}
	}
	double ans = inf;
	for (int i = 0;i <= k;i++)
		ans = min(ans, dis[s][i]);
	return ans;
}

• 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