結果
問題 | No.2418 情報通だよ!Nafmoくん |
ユーザー | hiromi_ayase |
提出日時 | 2023-08-12 14:38:03 |
言語 | Java21 (openjdk 21) |
結果 |
WA
|
実行時間 | - |
コード長 | 3,503 bytes |
コンパイル時間 | 3,454 ms |
コンパイル使用メモリ | 79,020 KB |
実行使用メモリ | 47,156 KB |
最終ジャッジ日時 | 2024-11-19 20:25:25 |
合計ジャッジ時間 | 8,845 ms |
ジャッジサーバーID (参考情報) |
judge2 / judge3 |
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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 | WA | - |
testcase_01 | WA | - |
testcase_02 | WA | - |
testcase_03 | WA | - |
testcase_04 | WA | - |
testcase_05 | WA | - |
testcase_06 | WA | - |
testcase_07 | WA | - |
testcase_08 | WA | - |
testcase_09 | WA | - |
testcase_10 | WA | - |
testcase_11 | WA | - |
testcase_12 | WA | - |
testcase_13 | WA | - |
testcase_14 | WA | - |
testcase_15 | WA | - |
testcase_16 | WA | - |
testcase_17 | WA | - |
testcase_18 | WA | - |
testcase_19 | WA | - |
testcase_20 | WA | - |
testcase_21 | WA | - |
testcase_22 | WA | - |
testcase_23 | AC | 54 ms
37,264 KB |
ソースコード
import java.util.*; import java.io.*; @SuppressWarnings("unused") public class Main { private static class DisjointSet { public int[] upper; // minus:num_element(root) plus:root(normal) // public int[] w; public DisjointSet(int n) { upper = new int[n]; Arrays.fill(upper, -1); // w = new int[n]; } public DisjointSet(DisjointSet ds) { this.upper = Arrays.copyOf(ds.upper, ds.upper.length); } public int root(int x) { return upper[x] < 0 ? x : (upper[x] = root(upper[x])); } public boolean equiv(int x, int y) { return root(x) == root(y); } public boolean union(int x, int y) { x = root(x); y = root(y); if(x != y) { if(upper[y] < upper[x]) { int d = x; x = y; y = d; } // w[x] += w[y]; upper[x] += upper[y]; upper[y] = x; } return x == y; } public int count() { int ct = 0; for(int u : upper){ if(u < 0)ct++; } return ct; } public int[][] toBucket() { int n = upper.length; int[][] ret = new int[n][]; int[] rp = new int[n]; for(int i = 0;i < n;i++){ if(upper[i] < 0)ret[i] = new int[-upper[i]]; } for(int i = 0;i < n;i++){ int r = root(i); ret[r][rp[r]++] = i; } return ret; } } private static void solve() { int n = ni(); int m = ni(); var ds = new DisjointSet(n * 2); for (int i = 0; i < m; i ++) { ds.union(ni()-1, ni()-1); } int ret = 0; for (int i = 0; i < n * 2; i ++) { if (i == ds.root(i)) { ret += -ds.upper[i] / 2; } } ret = n - ret * 2; System.out.println(ret); } public static void main(String[] args) { new Thread(null, new Runnable() { @Override public void run() { solve(); out.flush(); } }, "", 64000000).start(); } private static PrintWriter out = new PrintWriter(System.out); private static StringTokenizer tokenizer = null; private static BufferedReader reader = new BufferedReader(new InputStreamReader(System.in), 32768); public static String next() { while (tokenizer == null || !tokenizer.hasMoreTokens()) { try { tokenizer = new java.util.StringTokenizer(reader.readLine()); } catch (Exception e) { throw new RuntimeException(e); } } return tokenizer.nextToken(); } private static double nd() { return Double.parseDouble(next()); } private static long nl() { return Long.parseLong(next()); } private static int[] na(int n) { int[] a = new int[n]; for (int i = 0; i < n; i++) a[i] = ni(); return a; } private static char[] ns() { return next().toCharArray(); } private static long[] nal(int n) { long[] a = new long[n]; for (int i = 0; i < n; i++) a[i] = nl(); return a; } private static int[][] ntable(int n, int m) { int[][] table = new int[n][m]; for (int i = 0; i < n; i++) { for (int j = 0; j < m; j++) { table[i][j] = ni(); } } return table; } private static int[][] nlist(int n, int m) { int[][] table = new int[m][n]; for (int i = 0; i < n; i++) { for (int j = 0; j < m; j++) { table[j][i] = ni(); } } return table; } private static int ni() { return Integer.parseInt(next()); } }