結果
| 問題 |
No.1767 BLUE to RED
|
| コンテスト | |
| ユーザー |
tenten
|
| 提出日時 | 2021-11-27 12:30:15 |
| 言語 | Java (openjdk 23) |
| 結果 |
AC
|
| 実行時間 | 992 ms / 2,000 ms |
| コード長 | 3,487 bytes |
| コンパイル時間 | 1,978 ms |
| コンパイル使用メモリ | 78,876 KB |
| 実行使用メモリ | 82,252 KB |
| 最終ジャッジ日時 | 2024-06-30 03:32:14 |
| 合計ジャッジ時間 | 17,725 ms |
|
ジャッジサーバーID (参考情報) |
judge5 / judge3 |
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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.*;
public class Main {
public static void main(String[] args) throws Exception {
Scanner sc = new Scanner();
int n = sc.nextInt();
int m = sc.nextInt();
Field[] fields = new Field[n + m];
for (int i = 0; i < n; i++) {
fields[i] = new Field(true, sc.nextInt());
}
for (int i = n; i < n + m; i++) {
fields[i] = new Field(false, sc.nextInt());
}
Arrays.sort(fields);
UnionFindTree uft = new UnionFindTree(n + m + 1);
ArrayList<Path> list = new ArrayList<>();
for (int i = 0; i < n + m - 1; i++) {
if (fields[i].isRed) {
uft.unite(i, n + m);
}
list.add(new Path(i, i + 1, fields[i + 1].value - fields[i].value));
}
if (fields[n + m - 1].isRed) {
uft.unite(n + m - 1, n + m);
}
Collections.sort(list);
long ans = 0;
for (Path p : list) {
if (!uft.same(p)) {
uft.unite(p);
ans += p.value;
}
}
System.out.println(ans);
}
static class Field implements Comparable<Field> {
boolean isRed;
int value;
public Field(boolean isRed, int value) {
this.isRed = isRed;
this.value = value;
}
public int compareTo(Field another) {
return value - another.value;
}
}
static class Path implements Comparable<Path> {
int left;
int right;
int value;
public Path(int left, int right, int value) {
this.left = left;
this.right = right;
this.value = value;
}
public int compareTo(Path 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 (parents[x] == x) {
return x;
} else {
return parents[x] = find(parents[x]);
}
}
public boolean same(int x, int y) {
return find(x) == find(y);
}
public boolean same(Path p) {
return same(p.left, p.right);
}
public void unite(int x, int y) {
if (!same(x, y)) {
parents[find(x)] = find(y);
}
}
public void unite(Path p) {
unite(p.left, p.right);
}
}
}
class Scanner {
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
StringTokenizer st = new StringTokenizer("");
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 {
if (!st.hasMoreTokens()) {
st = new StringTokenizer(br.readLine());
}
return st.nextToken();
}
}
tenten