結果
| 問題 |
No.1767 BLUE to RED
|
| コンテスト | |
| ユーザー |
tenten
|
| 提出日時 | 2023-04-18 11:43:46 |
| 言語 | Java (openjdk 23) |
| 結果 |
AC
|
| 実行時間 | 1,198 ms / 2,000 ms |
| コード長 | 3,502 bytes |
| コンパイル時間 | 3,145 ms |
| コンパイル使用メモリ | 84,688 KB |
| 実行使用メモリ | 98,404 KB |
| 最終ジャッジ日時 | 2024-10-13 09:54:21 |
| 合計ジャッジ時間 | 22,077 ms |
|
ジャッジサーバーID (参考情報) |
judge4 / judge5 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 |
| other | AC * 21 |
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();
TreeSet<Integer> reds = new TreeSet<>();
for (int i = 0; i < n; i++) {
reds.add(sc.nextInt());
}
reds.add(Integer.MIN_VALUE / 2);
reds.add(Integer.MAX_VALUE);
PriorityQueue<Bridge> queue = new PriorityQueue<>();
int prev = 0;
for (int i = 1; i <= m; i++) {
int x = sc.nextInt();
queue.add(new Bridge(0, i, x - reds.floor(x)));
queue.add(new Bridge(0, i, reds.ceiling(x) - x));
if (i > 1) {
queue.add(new Bridge(i - 1, i, x - prev));
}
prev = x;
}
UnionFindTree uft = new UnionFindTree(m + 1);
long ans = 0;
while (queue.size() > 0) {
ans += uft.unite(queue.poll());
}
System.out.println(ans);
}
static class Bridge implements Comparable<Bridge> {
int left;
int right;
int value;
public Bridge(int left, int right, int value) {
this.left = left;
this.right = right;
this.value = value;
}
public int compareTo(Bridge another) {
return value - another.value;
}
}
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 parents[x];
} else {
return parents[x] = find(parents[x]);
}
}
public boolean same(Bridge b) {
return find(b.left) == find(b.right);
}
public int unite(Bridge b) {
if (same(b)) {
return 0;
} else {
parents[find(b.right)] = find(b.left);
return b.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();
}
}
tenten