結果
問題 | No.1488 Max Score of the Tree |
ユーザー | tenten |
提出日時 | 2023-04-25 16:52:44 |
言語 | Java21 (openjdk 21) |
結果 |
AC
|
実行時間 | 375 ms / 2,000 ms |
コード長 | 2,994 bytes |
コンパイル時間 | 5,458 ms |
コンパイル使用メモリ | 85,856 KB |
実行使用メモリ | 118,360 KB |
最終ジャッジ日時 | 2024-11-14 13:07:37 |
合計ジャッジ時間 | 9,178 ms |
ジャッジサーバーID (参考情報) |
judge5 / 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 | AC | 199 ms
116,552 KB |
testcase_01 | AC | 256 ms
111,824 KB |
testcase_02 | AC | 295 ms
115,604 KB |
testcase_03 | AC | 243 ms
118,304 KB |
testcase_04 | AC | 375 ms
118,360 KB |
testcase_05 | AC | 53 ms
36,824 KB |
testcase_06 | AC | 109 ms
63,096 KB |
testcase_07 | AC | 159 ms
94,600 KB |
testcase_08 | AC | 119 ms
71,904 KB |
testcase_09 | AC | 145 ms
69,332 KB |
testcase_10 | AC | 146 ms
97,236 KB |
testcase_11 | AC | 269 ms
118,200 KB |
testcase_12 | AC | 52 ms
37,196 KB |
testcase_13 | AC | 123 ms
55,000 KB |
testcase_14 | AC | 144 ms
76,916 KB |
testcase_15 | AC | 118 ms
65,844 KB |
testcase_16 | AC | 66 ms
44,496 KB |
testcase_17 | AC | 104 ms
53,252 KB |
testcase_18 | AC | 203 ms
98,724 KB |
testcase_19 | AC | 128 ms
73,756 KB |
testcase_20 | AC | 104 ms
53,724 KB |
testcase_21 | AC | 68 ms
44,500 KB |
testcase_22 | AC | 125 ms
64,636 KB |
testcase_23 | AC | 52 ms
37,184 KB |
testcase_24 | AC | 51 ms
37,160 KB |
testcase_25 | AC | 54 ms
42,784 KB |
testcase_26 | AC | 99 ms
55,132 KB |
testcase_27 | AC | 60 ms
39,720 KB |
testcase_28 | AC | 93 ms
49,568 KB |
testcase_29 | AC | 106 ms
50,596 KB |
testcase_30 | AC | 160 ms
103,676 KB |
testcase_31 | AC | 297 ms
117,952 KB |
ソースコード
import java.io.*; import java.util.*; import java.util.stream.*; public class Main { static int[] lengths; static long[] counts; static long[][] dp; static ArrayList<HashMap<Integer, Integer>> graph = new ArrayList<>(); public static void main(String[] args) throws Exception { Scanner sc = new Scanner(); int n = sc.nextInt(); int k = sc.nextInt(); for (int i = 0; i < n; i++) { graph.add(new HashMap<>()); } lengths = new int[n - 1]; counts = new long[n - 1]; for (int i = 0; i < n - 1; i++) { int a = sc.nextInt() - 1; int b = sc.nextInt() - 1; lengths[i] = sc.nextInt(); graph.get(a).put(b, i); graph.get(b).put(a, i); } getCount(0, 0); dp = new long[n - 1][k + 1]; for (long[] arr : dp) { Arrays.fill(arr, -1); } System.out.println(dfw(n - 2, k)); } static long getCount(int idx, int p) { long count = 0; if (graph.get(idx).size() == 1) { count++; } for (int x : graph.get(idx).keySet()) { if (x == p) { continue; } counts[graph.get(idx).get(x)] = getCount(x, idx); count += counts[graph.get(idx).get(x)]; } return count; } static long dfw(int idx, int v) { if (v < 0) { return Long.MIN_VALUE; } if (idx < 0) { return 0; } if (dp[idx][v] < 0) { dp[idx][v] = Math.max(dfw(idx - 1, v) + lengths[idx] * counts[idx], dfw(idx - 1, v - lengths[idx]) + lengths[idx] * counts[idx] * 2); } return dp[idx][v]; } } 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(); } }