結果
問題 |
No.1147 土偶Ⅱ
|
ユーザー |
![]() |
提出日時 | 2023-02-16 16:14:44 |
言語 | Java (openjdk 23) |
結果 |
AC
|
実行時間 | 128 ms / 500 ms |
コード長 | 2,729 bytes |
コンパイル時間 | 3,788 ms |
コンパイル使用メモリ | 95,964 KB |
実行使用メモリ | 53,300 KB |
最終ジャッジ日時 | 2024-07-18 16:35:31 |
合計ジャッジ時間 | 6,004 ms |
ジャッジサーバーID (参考情報) |
judge3 / judge2 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 3 |
other | AC * 20 |
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(); ArrayList<ArrayList<Integer>> graph = new ArrayList<>(); ArrayList<HashSet<Integer>> relations = new ArrayList<>(); for (int i = 0; i < n; i++) { graph.add(new ArrayList<>()); relations.add(new HashSet<>()); } for (int i = 0; i < m; i++) { int a = sc.nextInt() - 1; int b = sc.nextInt() - 1; graph.get(a).add(b); graph.get(b).add(a); } for (int i = 0; i < n; i++) { for (int x : graph.get(i)) { relations.get(i).addAll(graph.get(x)); } for (int x : graph.get(i)) { relations.get(i).remove(x); } relations.get(i).remove(i); } int ans = 0; for (int i = 0; i < n; i++) { for (int j = i + 1; j < n; j++) { if (relations.get(i).contains(j)) { continue; } for (int k = j + 1; k < n; k++) { if (relations.get(i).contains(k) || relations.get(j).contains(k)) { continue; } ans++; } } } System.out.println(ans); } } 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(); } }