結果
| 問題 |
No.1607 Kth Maximum Card
|
| コンテスト | |
| ユーザー |
tenten
|
| 提出日時 | 2023-02-03 13:58:40 |
| 言語 | Java (openjdk 23) |
| 結果 |
AC
|
| 実行時間 | 3,169 ms / 3,500 ms |
| コード長 | 3,196 bytes |
| コンパイル時間 | 2,449 ms |
| コンパイル使用メモリ | 85,532 KB |
| 実行使用メモリ | 100,912 KB |
| 最終ジャッジ日時 | 2024-07-02 14:11:29 |
| 合計ジャッジ時間 | 45,855 ms |
|
ジャッジサーバーID (参考情報) |
judge4 / judge1 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 |
| other | AC * 33 |
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 k = sc.nextInt();
ArrayList<ArrayList<Path>> graph = new ArrayList<>();
for (int i = 0; i < n; i++) {
graph.add(new ArrayList<>());
}
for (int i = 0; i < m; i++) {
int a = sc.nextInt() - 1;
int b = sc.nextInt() - 1;
int c = sc.nextInt();
graph.get(a).add(new Path(b, c));
graph.get(b).add(new Path(a, c));
}
int left = -1;
int right = 200001;
int[] costs = new int[n];
PriorityQueue<Path> queue = new PriorityQueue<>();
while (right - left > 1) {
int z = (left + right) / 2;
queue.add(new Path(0, 0));
Arrays.fill(costs, Integer.MAX_VALUE);
while (queue.size() > 0) {
Path p = queue.poll();
if (costs[p.idx] <= p.value) {
continue;
}
costs[p.idx] = p.value;
for (Path x : graph.get(p.idx)) {
int add = 0;
if (x.value > z) {
add = 1;
}
queue.add(new Path(x.idx, p.value + add));
}
}
if (costs[n - 1] >= k) {
left = z;
} else {
right = z;
}
}
System.out.println(right);
}
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;
}
}
}
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();
}
}
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