結果
問題 | No.2072 Anatomy |
ユーザー | 37zigen |
提出日時 | 2022-09-15 11:13:38 |
言語 | Java21 (openjdk 21) |
結果 |
AC
|
実行時間 | 217 ms / 2,000 ms |
コード長 | 3,026 bytes |
コンパイル時間 | 2,649 ms |
コンパイル使用メモリ | 79,628 KB |
実行使用メモリ | 48,260 KB |
最終ジャッジ日時 | 2024-05-09 13:25:12 |
合計ジャッジ時間 | 9,821 ms |
ジャッジサーバーID (参考情報) |
judge4 / judge1 |
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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 | 64 ms
38,224 KB |
testcase_01 | AC | 64 ms
37,808 KB |
testcase_02 | AC | 66 ms
38,440 KB |
testcase_03 | AC | 66 ms
37,920 KB |
testcase_04 | AC | 68 ms
38,224 KB |
testcase_05 | AC | 70 ms
38,144 KB |
testcase_06 | AC | 69 ms
38,352 KB |
testcase_07 | AC | 69 ms
38,224 KB |
testcase_08 | AC | 206 ms
44,824 KB |
testcase_09 | AC | 201 ms
45,196 KB |
testcase_10 | AC | 217 ms
44,500 KB |
testcase_11 | AC | 203 ms
44,984 KB |
testcase_12 | AC | 199 ms
44,688 KB |
testcase_13 | AC | 208 ms
45,112 KB |
testcase_14 | AC | 186 ms
44,592 KB |
testcase_15 | AC | 170 ms
43,964 KB |
testcase_16 | AC | 203 ms
45,240 KB |
testcase_17 | AC | 204 ms
45,088 KB |
testcase_18 | AC | 155 ms
41,784 KB |
testcase_19 | AC | 202 ms
45,392 KB |
testcase_20 | AC | 202 ms
45,212 KB |
testcase_21 | AC | 192 ms
45,972 KB |
testcase_22 | AC | 202 ms
45,184 KB |
testcase_23 | AC | 200 ms
46,256 KB |
testcase_24 | AC | 200 ms
47,584 KB |
testcase_25 | AC | 208 ms
45,136 KB |
testcase_26 | AC | 70 ms
37,948 KB |
testcase_27 | AC | 194 ms
48,260 KB |
testcase_28 | AC | 196 ms
45,240 KB |
ソースコード
import java.io.IOException; import java.io.InputStream; import java.io.PrintWriter; import java.util.Arrays; import java.util.HashSet; import java.util.NoSuchElementException; import java.util.Set; public class Main implements Runnable { public static void main(String[] args) { new Thread(null, new Main(), "", Runtime.getRuntime().maxMemory()).start(); } class DSU { int[] parent; public DSU(int n) { parent=new int[n]; Arrays.fill(parent, -1); } boolean isRoot(int x) { return parent[x]<0; } int root(int x) { return isRoot(x) ? x : (parent[x]=root(parent[x])); } boolean equiv(int x, int y) { return root(x)==root(y); } void union(int x, int y) { x=root(x); y=root(y); if (x==y) return; parent[x]=y; } } public void run() { FastScanner sc = new FastScanner(); PrintWriter pw=new PrintWriter(System.out); int N=sc.nextInt(); int M=sc.nextInt(); int[] u=new int[M]; int[] v=new int[M]; for (int i=0;i<M;++i) { u[i]=sc.nextInt()-1; v[i]=sc.nextInt()-1; } DSU dsu=new DSU(N); int[] ans=new int[N]; Arrays.fill(ans, 0); for (int i=M-1;i>=0;--i) { int nv=Math.max(ans[dsu.root(u[i])], ans[dsu.root(v[i])])+1; dsu.union(u[i], v[i]); ans[dsu.root(u[i])]=nv; } System.out.println(Arrays.stream(ans).max().getAsInt()); pw.close(); } void tr(Object... objects) { System.err.println(Arrays.deepToString(objects)); } } class FastScanner { private final InputStream in = System.in; private final byte[] buffer = new byte[1024]; private int ptr = 0; private int buflen = 0; private boolean hasNextByte() { if (ptr < buflen) { return true; } else { ptr = 0; try { buflen = in.read(buffer); } catch (IOException e) { e.printStackTrace(); } if (buflen <= 0) { return false; } } return true; } private int readByte() { if (hasNextByte()) return buffer[ptr++]; else return -1; } private static boolean isPrintableChar(int c) { return 33 <= c && c <= 126; } private void skipUnprintable() { while (hasNextByte() && !isPrintableChar(buffer[ptr])) ptr++; } public boolean hasNext() { skipUnprintable(); return hasNextByte(); } public String next() { if (!hasNext()) throw new NoSuchElementException(); StringBuilder sb = new StringBuilder(); int b = readByte(); while (isPrintableChar(b)) { sb.appendCodePoint(b); b = readByte(); } return sb.toString(); } public long nextLong() { if (!hasNext()) throw new NoSuchElementException(); long n = 0; boolean minus = false; int b = readByte(); if (b == '-') { minus = true; b = readByte(); } if (b < '0' || '9' < b) { throw new NumberFormatException(); } while (true) { if ('0' <= b && b <= '9') { n *= 10; n += b - '0'; } else if (b == -1 || !isPrintableChar(b)) { return minus ? -n : n; } else { throw new NumberFormatException(); } b = readByte(); } } public int nextInt() { return (int) nextLong(); } }