結果
| 問題 |
No.1382 Travel in Mitaru city
|
| コンテスト | |
| ユーザー |
tenten
|
| 提出日時 | 2023-03-23 10:02:50 |
| 言語 | Java (openjdk 23) |
| 結果 |
AC
|
| 実行時間 | 924 ms / 2,000 ms |
| コード長 | 3,245 bytes |
| コンパイル時間 | 3,746 ms |
| コンパイル使用メモリ | 93,232 KB |
| 実行使用メモリ | 68,036 KB |
| 最終ジャッジ日時 | 2024-12-27 23:32:07 |
| 合計ジャッジ時間 | 45,993 ms |
|
ジャッジサーバーID (参考情報) |
judge3 / judge2 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 |
| other | AC * 68 |
ソースコード
import java.io.*;
import java.util.*;
import java.util.stream.*;
public class Main {
public static void main(String[] args) throws Exception {
Scanner sc = new Scanner();
int n = sc.nextInt();
int m = sc.nextInt();
int s = sc.nextInt() - 1;
int t = sc.nextInt() - 1;
City[] cities = new City[n];
ArrayList<ArrayList<City>> graph = new ArrayList<>();
for (int i = 0; i < n; i++) {
cities[i] = new City(i, sc.nextInt());
graph.add(new ArrayList<>());
}
for (int i = 0; i < m; i++) {
int a = sc.nextInt() - 1;
int b = sc.nextInt() - 1;
graph.get(a).add(cities[b]);
graph.get(b).add(cities[a]);
}
TreeSet<City> nextTo = new TreeSet<>();
int current = cities[s].value;
nextTo.addAll(graph.get(s));
HashSet<Integer> visited = new HashSet<>();
visited.add(s);
int ans = 0;
while (nextTo.size() > 0) {
City y = nextTo.pollLast();
if (visited.contains(y.idx)) {
continue;
}
visited.add(y.idx);
if (y.value < current) {
ans++;
current = y.value;
}
nextTo.addAll(graph.get(y.idx));
}
System.out.println(ans);
}
static class City implements Comparable<City> {
int idx;
int value;
public City(int idx, int value) {
this.idx = idx;
this.value = value;
}
public int compareTo(City another) {
if (value == another.value) {
return idx - another.idx;
} else {
return value - another.value;
}
}
public int hashCode() {
return idx;
}
public boolean equals(Object o) {
City x = (City)o;
return x.idx == idx;
}
}
}
class Utilities {
static String arrayToLineString(Object[] arr) {
return Arrays.stream(arr).map(x -> x.toString()).collect(Collectors.joining("\n"));
}
static String arrayToLineString(int[] arr) {
return String.join("\n", Arrays.stream(arr).mapToObj(String::valueOf).toArray(String[]::new));
}
}
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 int[] nextIntArray() throws Exception {
return Stream.of(br.readLine().split(" ")).mapToInt(Integer::parseInt).toArray();
}
public String next() throws Exception {
while (!st.hasMoreTokens()) {
st = new StringTokenizer(br.readLine());
}
return st.nextToken();
}
}
tenten