제출 #967041

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
967041		dubabuba	사이버랜드 (APIO23_cyberland)	C++17	0 / 100	28 ms	33228 KiB

cyberland

#include <bits/stdc++.h>
#include "cyberland.h"

using namespace std;

typedef double dbl;
typedef long long i64;
typedef vector<int> vi;
typedef pair<int, int> pii;
#define ff first
#define ss second
#define MP make_pair

const int mxk = 32;
const int mxn = 1e5 + 10;
vector<pii> adj[mxn];
dbl dis[mxk][mxn];
bool in[mxn];

dbl solve(int N, int M, int K, int H, vi x, vi y, vi c, vi arr) {
	for(int i = 0; i < N; i++) {
		in[i] = 0;
		adj[i].clear();
	}

	for(int i = 0; i < M; i++) {
		adj[x[i]].push_back(MP(y[i], c[i]));
		adj[y[i]].push_back(MP(x[i], c[i]));
	}

	priority_queue<pair<pair<dbl, int>, int>> pq;
	queue<int> q;
	in[0] = 1;
	q.push(0);

	pq.push(MP(MP(0.0, 0), 0));
	while(q.size()) {
		int u = q.front();
		q.pop();

		if(arr[u] == 0)
			pq.push(MP(MP(0.0, 0), u));

		for(pii p : adj[u]) {
			int v = p.ff;
			if(!in[v]) {
				in[v] = 1;
				q.push(v);
			}
		}
	}

	for(int i = 0; i < mxk; i++)
	for(int j = 0; j < N; j++)
		dis[i][j] = -1.0;

	while(pq.size()) {
		dbl d = -pq.top().ff.ff;
		int k = pq.top().ff.ss;
		int u = pq.top().ss;
		pq.pop();

		if(dis[k][u] < d) continue;
		dis[k][u] = d;
		if(u == H) continue;

		for(pii p : adj[u]) {
			int v = p.ff;
			dbl c = p.ss;
			if(v == 0) continue;
			if(arr[v] == 0) continue;
			pq.push(MP(MP(-(d + c), k), v));
			if(arr[v] == 2 && k + 1 <= K && k + 1 < mxk)
				pq.push(MP(MP(-(d + c) / 2.0, k + 1), v));
		}
	}

	dbl ans = 1e18;
	for(int i = 0; i < mxk && i <= K; i++)
	if(dis[i][H] > -1.0)
		ans = min(ans, dis[i][H]);
	if(ans == 1e18) return -1;
	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