結果
| 問題 | No.1473 おでぶなおばけさん |
| コンテスト | |
| ユーザー |
tenten
|
| 提出日時 | 2022-09-30 13:21:12 |
| 言語 | Java (openjdk 23) |
| 結果 |
WA
|
| 実行時間 | - |
| コード長 | 3,714 bytes |
| 記録 | |
| コンパイル時間 | 3,730 ms |
| コンパイル使用メモリ | 89,860 KB |
| 実行使用メモリ | 66,612 KB |
| 最終ジャッジ日時 | 2024-12-22 18:45:44 |
| 合計ジャッジ時間 | 33,217 ms |
|
ジャッジサーバーID (参考情報) |
judge2 / judge1 |
(要ログイン)
| ファイルパターン | 結果 |
|---|---|
| sample | AC * 2 |
| other | AC * 36 WA * 11 |
ソースコード
import java.io.*;
import java.util.*;
public class Main {
public static void main(String[] args) throws Exception {
Scanner sc = new Scanner();
int n = sc.nextInt();
int m = sc.nextInt();
Road[] roads = new Road[m];
for (int i = 0; i < m; i++) {
roads[i] = new Road(sc.nextInt() - 1, sc.nextInt() - 1, sc.nextInt());
}
Arrays.sort(roads);
ArrayList<ArrayList<Integer>> graph = new ArrayList<>();
for (int i = 0; i < n; i++) {
graph.add(new ArrayList<>());
}
UnionFindTree uft = new UnionFindTree(n);
int ans = 0;
for (Road x : roads) {
uft.unite(x);
graph.get(x.left).add(x.right);
graph.get(x.right).add(x.left);
if (uft.same(0, n - 1)) {
ans = x.weight;
break;
}
}
PriorityQueue<Path> queue = new PriorityQueue<>();
int[] costs = new int[n];
Arrays.fill(costs, Integer.MAX_VALUE);
queue.add(new Path(0, 0));
while (queue.size() > 0) {
Path p = queue.poll();
if (costs[p.idx] <= p.value) {
continue;
}
costs[p.idx] = p.value;
for (int x : graph.get(p.idx)) {
queue.add(new Path(x, p.value + 1));
}
}
System.out.println(ans + " " + costs[n - 1]);
}
static class Path implements Comparable<Path> {
int idx;
int value;
public Path(int idx, int value) {
this.idx = idx;
this.value = value;
}
public int compareTo(Path another) {
return value - another.value;
}
}
static class Road implements Comparable<Road> {
int left;
int right;
int weight;
public Road(int left, int right, int weight) {
this.left = left;
this.right = right;
this.weight = weight;
}
public int compareTo(Road another) {
return another.weight - weight;
}
}
static class UnionFindTree {
int[] parents;
public UnionFindTree(int size) {
parents = new int[size];
for (int i = 0; i < size; i++) {
parents[i] = i;
}
}
public int find(int x) {
if (x == parents[x]) {
return x;
} else {
return parents[x] = find(parents[x]);
}
}
public boolean same(int x, int y) {
return find(x) == find(y);
}
public void unite(int x, int y) {
if (!same(x, y)) {
parents[find(x)] = find(y);
}
}
public void unite(Road r) {
unite(r.left, r.right);
}
}
}
class Scanner {
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
StringTokenizer st = new StringTokenizer("");
StringBuilder sb = new StringBuilder();
public Scanner() throws Exception {
}
public int nextInt() throws Exception {
return Integer.parseInt(next());
}
public long nextLong() throws Exception {
return Long.parseLong(next());
}
public double nextDouble() throws Exception {
return Double.parseDouble(next());
}
public String next() throws Exception {
while (!st.hasMoreTokens()) {
st = new StringTokenizer(br.readLine());
}
return st.nextToken();
}
}
tenten