結果
問題 | No.1221 木 *= 3 |
ユーザー |
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提出日時 | 2023-04-11 15:48:35 |
言語 | Java (openjdk 23) |
結果 |
AC
|
実行時間 | 817 ms / 2,000 ms |
コード長 | 2,551 bytes |
コンパイル時間 | 3,781 ms |
コンパイル使用メモリ | 97,124 KB |
実行使用メモリ | 83,368 KB |
最終ジャッジ日時 | 2024-10-07 08:56:30 |
合計ジャッジ時間 | 15,722 ms |
ジャッジサーバーID (参考情報) |
judge2 / judge1 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 4 |
other | AC * 18 |
ソースコード
import java.io.*;import java.util.*;import java.util.stream.*;public class Main {static long[] losts;static long[] exists;static long[] dp1;static long[] dp2;static ArrayList<ArrayList<Integer>> graph = new ArrayList<>();public static void main(String[] args) throws Exception {Scanner sc = new Scanner();int n = sc.nextInt();losts = new long[n];for (int i = 0; i < n; i++) {losts[i] = sc.nextInt();graph.add(new ArrayList<>());}exists = new long[n];for (int i = 0; i < n; i++) {exists[i] = sc.nextInt();}for (int i = 0; i < n - 1; i++) {int a = sc.nextInt() - 1;int b = sc.nextInt() - 1;graph.get(a).add(b);graph.get(b).add(a);}dp1 = new long[n];dp2 = new long[n];calc(0, 0);System.out.println(Math.max(dp1[0], dp2[0]));}static void calc(int idx, int p) {dp1[idx] = losts[idx];for (int x : graph.get(idx)) {if (x == p) {continue;}calc(x, idx);dp1[idx] += Math.max(dp1[x], dp2[x]);dp2[idx] += Math.max(dp1[x], dp2[x] + exists[idx] + exists[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();}}