結果
問題 | No.277 根掘り葉掘り |
ユーザー | kenkoooo |
提出日時 | 2015-09-08 03:08:27 |
言語 | Java (openjdk 23) |
結果 |
WA
|
実行時間 | - |
コード長 | 2,896 bytes |
コンパイル時間 | 2,573 ms |
コンパイル使用メモリ | 88,664 KB |
実行使用メモリ | 79,324 KB |
最終ジャッジ日時 | 2024-07-19 04:56:10 |
合計ジャッジ時間 | 8,950 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 | 72 ms
37,580 KB |
testcase_01 | AC | 71 ms
37,528 KB |
testcase_02 | WA | - |
testcase_03 | AC | 70 ms
37,752 KB |
testcase_04 | AC | 73 ms
37,764 KB |
testcase_05 | AC | 71 ms
37,564 KB |
testcase_06 | AC | 72 ms
37,756 KB |
testcase_07 | AC | 71 ms
37,512 KB |
testcase_08 | AC | 69 ms
37,600 KB |
testcase_09 | AC | 587 ms
79,324 KB |
testcase_10 | AC | 388 ms
61,124 KB |
testcase_11 | AC | 375 ms
62,256 KB |
testcase_12 | AC | 438 ms
72,352 KB |
testcase_13 | WA | - |
testcase_14 | WA | - |
testcase_15 | WA | - |
testcase_16 | WA | - |
testcase_17 | WA | - |
testcase_18 | WA | - |
testcase_19 | WA | - |
ソースコード
import java.io.IOException; import java.io.InputStream; import java.util.ArrayList; import java.util.Arrays; import java.util.NoSuchElementException; public class Main { private int[] R, L; private ArrayList<ArrayList<Integer>> graph; public void solve() { FastScanner scanner = new FastScanner(); int N = (int) scanner.nextLong(); graph = new ArrayList<>(); for (int i = 0; i < N; i++) { graph.add(new ArrayList<Integer>()); } for (int i = 0; i < N - 1; i++) { int from = (int) scanner.nextLong() - 1; int to = (int) scanner.nextLong() - 1; graph.get(from).add(to); graph.get(to).add(from); } R = new int[N]; Arrays.fill(R, N * 2); L = new int[N]; Arrays.fill(L, N * 2); R[0] = dfs(0, -1, 0); StringBuilder builder = new StringBuilder(); for (int i = 0; i < N; i++) { builder.append(Math.min(L[i], R[i]) + "\n"); } System.out.print(builder.toString()); } private int dfs(int now, int parent, int dist) { L[now] = dist; if (graph.get(now).size() == 1 && now != 0) { return 0; } int fromLeaf = Integer.MAX_VALUE; for (int next : graph.get(now)) { if (next != parent) { R[next] = Math.min(R[next], dfs(next, now, dist + 1)); fromLeaf = Math.min(R[next], fromLeaf); } } return fromLeaf + 1; } public static void main(String[] args) { new Main().solve(); } } 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(); } } }