結果
| 問題 |
No.2319 Friends+
|
| コンテスト | |
| ユーザー |
tenten
|
| 提出日時 | 2023-05-30 13:03:02 |
| 言語 | Java (openjdk 23) |
| 結果 |
AC
|
| 実行時間 | 1,116 ms / 3,000 ms |
| コード長 | 3,296 bytes |
| コンパイル時間 | 3,153 ms |
| コンパイル使用メモリ | 92,504 KB |
| 実行使用メモリ | 209,196 KB |
| 最終ジャッジ日時 | 2024-12-28 11:45:00 |
| 合計ジャッジ時間 | 43,614 ms |
|
ジャッジサーバーID (参考情報) |
judge1 / judge5 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 2 |
| other | AC * 45 |
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();
BitSet.size = n;
BitSet[] locations = new BitSet[n];
BitSet[] friends = new BitSet[n];
for (int i = 0; i < n; i++) {
locations[i] = new BitSet();
friends[i] = new BitSet();
}
int[] place = new int[n];
for (int i = 0; i < n; i++) {
place[i] = sc.nextInt() - 1;
locations[place[i]].add(i);
}
for (int i = 0; i < m; i++) {
int a = sc.nextInt() - 1;
int b = sc.nextInt() - 1;
friends[a].add(b);
friends[b].add(a);
}
int q = sc.nextInt();
StringBuilder sb = new StringBuilder();
while (q-- > 0) {
int a = sc.nextInt() - 1;
int b = sc.nextInt() - 1;
if (place[a] != place[b] && locations[place[b]].and(friends[a])) {
sb.append("Yes\n");
locations[place[a]].draw(a);
place[a] = place[b];
locations[place[a]].add(a);
} else {
sb.append("No\n");
}
}
System.out.print(sb);
}
static class BitSet {
static int size;
int count;
long[] values;
public BitSet() {
count = (size + 60 - 1) / 60;
values = new long[count];
}
public void add(int idx) {
values[idx / 60] |= (1L << (idx % 60));
}
public void draw(int idx) {
values[idx / 60] ^= (1L << (idx % 60));
}
public boolean and(BitSet another) {
for (int i = 0; i < count; i++) {
if ((values[i] & another.values[i]) > 0) {
return true;
}
}
return false;
}
}
}
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