結果
問題 | No.826 連絡網 |
ユーザー | tenten |
提出日時 | 2023-01-10 12:47:47 |
言語 | Java21 (openjdk 21) |
結果 |
AC
|
実行時間 | 161 ms / 2,000 ms |
コード長 | 2,876 bytes |
コンパイル時間 | 2,919 ms |
コンパイル使用メモリ | 88,140 KB |
実行使用メモリ | 61,616 KB |
最終ジャッジ日時 | 2024-06-01 07:50:46 |
合計ジャッジ時間 | 7,289 ms |
ジャッジサーバーID (参考情報) |
judge2 / judge4 |
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テストケース
テストケース表示入力 | 結果 | 実行時間 実行使用メモリ |
---|---|---|
testcase_00 | AC | 57 ms
50,368 KB |
testcase_01 | AC | 57 ms
50,232 KB |
testcase_02 | AC | 58 ms
50,492 KB |
testcase_03 | AC | 61 ms
50,084 KB |
testcase_04 | AC | 61 ms
50,440 KB |
testcase_05 | AC | 56 ms
50,380 KB |
testcase_06 | AC | 59 ms
50,468 KB |
testcase_07 | AC | 63 ms
50,324 KB |
testcase_08 | AC | 61 ms
50,140 KB |
testcase_09 | AC | 61 ms
50,504 KB |
testcase_10 | AC | 57 ms
50,328 KB |
testcase_11 | AC | 60 ms
50,372 KB |
testcase_12 | AC | 147 ms
58,684 KB |
testcase_13 | AC | 101 ms
54,420 KB |
testcase_14 | AC | 123 ms
57,220 KB |
testcase_15 | AC | 89 ms
51,104 KB |
testcase_16 | AC | 103 ms
54,456 KB |
testcase_17 | AC | 104 ms
54,116 KB |
testcase_18 | AC | 100 ms
54,288 KB |
testcase_19 | AC | 155 ms
61,616 KB |
testcase_20 | AC | 146 ms
60,764 KB |
testcase_21 | AC | 63 ms
50,584 KB |
testcase_22 | AC | 104 ms
54,444 KB |
testcase_23 | AC | 112 ms
54,700 KB |
testcase_24 | AC | 96 ms
52,192 KB |
testcase_25 | AC | 161 ms
60,488 KB |
testcase_26 | AC | 98 ms
51,948 KB |
testcase_27 | AC | 145 ms
58,992 KB |
testcase_28 | AC | 127 ms
57,456 KB |
testcase_29 | AC | 109 ms
54,184 KB |
testcase_30 | AC | 161 ms
59,600 KB |
testcase_31 | AC | 108 ms
54,688 KB |
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 p = sc.nextInt(); UnionFindTree uft = new UnionFindTree(n + 1); boolean[] isNotPrimes = new boolean[n + 1]; for (int i = 2; i <= n; i++) { if (!isNotPrimes[i]) { for (int j = 2; j * i <= n; j++) { isNotPrimes[j * i] = true; uft.unite(i, j * i); } } } System.out.println(uft.getCount(p)); } static class UnionFindTree { int[] parents; int[] counts; public UnionFindTree(int size) { parents = new int[size]; counts = new int[size]; for (int i = 0; i < size; i++) { parents[i] = i; counts[i] = 1; } } public int find(int x) { if (x == parents[x]) { return x; } else { return parents[x] = find(parents[x]); } } public boolean same(int x, int y) { return find(x) == find(y); } public void unite(int x, int y) { int xx = find(x); int yy = find(y); if (xx == yy) { return; } parents[yy] = xx; counts[xx] += counts[yy]; } public int getCount(int x) { return counts[find(x)]; } } } 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(); } }