oj.uz

답안 #889201

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
889201 2023-12-19T07:25:12 Z Onown 공장들 (JOI14_factories) C++17
18 / 100
 5158 ms 213336 KB 
#include <bits/stdc++.h>
#include <factories.h>
using namespace std;

const int N = 5e5 + 55, L = 2e0 + 20, Q = 1e2 + 12;
const long long I = 1e18 + 118;
int n, q, h[N], par[N][L];
long long spt[N][L], dis[N];
vector<pair<int, int>> adj[N];

void dfs(int v, int p) {
	for (auto [u, w]: adj[v])
		if (u != p) {
			par[u][0] = v;
			spt[u][0] = w;
			h[u] = h[v] + 1;
			dfs(u, v);
		}
}

void dfsu(int v, int p) {
	for (auto [u, w]: adj[v])
		if (u != p) {
			dfs(u, v);
			dis[v] = min(dis[v], dis[u] + w);
		}
}

void dfsd(int v, int p) {
	for (auto [u, w]: adj[v])
		if (u != p) {
			dis[u] = min(dis[u], dis[v] + w);
			dfs(u, v);
		}
}

long long distance(int v, int u) {
	long long ans = 0;
	if (h[v] < h[u]) swap(v, u);
	for (int i = 0; i < L; i++)
		if ((1 << i) & (h[v] - h[u])) {
			ans += spt[v][i];
			v = par[v][i];
		}
	if (v == u) return ans;

	for (int i = L - 1; i >= 0; i--)
		if (par[v][i] != par[u][i]) {
			ans += spt[v][i] + spt[u][i];
			v = par[v][i];
			u = par[u][i];
		}
	return ans + spt[v][0] + spt[u][0];
}

void Init(int N, int A[], int B[], int D[]) {
	n = N;
	for (int i = 0; i < n - 1; i++) {
		adj[A[i] + 1].push_back({B[i] + 1, D[i]});
		adj[B[i] + 1].push_back({A[i] + 1, D[i]});
	}

	dfs(1, 0);
	for (int i = 1; i < L; i++)
		for (int j = 1; j <= n; j++) {
			par[j][i] = par[par[j][i - 1]][i - 1];
			spt[j][i] = spt[j][i - 1] + spt[par[j][i - 1]][i - 1];
		}
	for (int i = 0; i < N; dis[i++] = I);
}

long long Query(int S, int X[], int T, int Y[]) {
	if (S < Q) {
		long long ans = I;
		for (int i = 0; i < T; i++)
			for (int j = 0; j < S; j++)
				ans = min(ans, distance(Y[i] + 1, X[j] + 1));
		return ans;
	}
	
	for (int i = 0; i < S; i++) 
		dis[X[i] + 1] = 0;
	dfsu(1, 0);
	dfsd(1, 0);

	long long ans = I;
	for (int i = 0; i < T; i++) ans = min(ans, dis[Y[i] + 1]);
	for (int i = 0; i < N; dis[i++] = I);
	return ans;
}

Subtask #1
0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 99 ms 35508 KB Output is correct
2 Incorrect 921 ms 41848 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #2
18.0 / 18.0

# 결과 실행 시간 메모리 Grader output
1 Correct 7 ms 35416 KB Output is correct
2 Correct 1188 ms 188992 KB Output is correct
3 Correct 3386 ms 191880 KB Output is correct
4 Correct 810 ms 189860 KB Output is correct
5 Correct 3537 ms 213336 KB Output is correct
6 Correct 2615 ms 191984 KB Output is correct
7 Correct 4475 ms 71480 KB Output is correct
8 Correct 1020 ms 71364 KB Output is correct
9 Correct 5158 ms 74064 KB Output is correct
10 Correct 2919 ms 71900 KB Output is correct

Subtask #3
0 / 67.0

# 결과 실행 시간 메모리 Grader output
1 Correct 99 ms 35508 KB Output is correct
2 Incorrect 921 ms 41848 KB Output isn't correct
3 Halted 0 ms 0 KB -