結果
問題 | No.386 貪欲な領主 |
ユーザー | tenten |
提出日時 | 2023-06-13 18:28:58 |
言語 | Java21 (openjdk 21) |
結果 |
AC
|
実行時間 | 933 ms / 2,000 ms |
コード長 | 3,529 bytes |
コンパイル時間 | 2,731 ms |
コンパイル使用メモリ | 96,028 KB |
実行使用メモリ | 114,612 KB |
最終ジャッジ日時 | 2024-06-22 04:09:00 |
合計ジャッジ時間 | 8,917 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 | 48 ms
50,084 KB |
testcase_01 | AC | 48 ms
50,548 KB |
testcase_02 | AC | 51 ms
50,528 KB |
testcase_03 | AC | 51 ms
50,312 KB |
testcase_04 | AC | 793 ms
109,112 KB |
testcase_05 | AC | 741 ms
92,064 KB |
testcase_06 | AC | 764 ms
92,396 KB |
testcase_07 | AC | 113 ms
52,760 KB |
testcase_08 | AC | 212 ms
58,408 KB |
testcase_09 | AC | 124 ms
53,256 KB |
testcase_10 | AC | 47 ms
50,596 KB |
testcase_11 | AC | 49 ms
50,668 KB |
testcase_12 | AC | 112 ms
53,000 KB |
testcase_13 | AC | 147 ms
55,384 KB |
testcase_14 | AC | 703 ms
92,408 KB |
testcase_15 | AC | 933 ms
114,612 KB |
ソースコード
import java.io.*; import java.util.*; import java.util.stream.*; public class Main { static ArrayList<ArrayList<Integer>> graph = new ArrayList<>(); static int[] values; static int[][] parents; static int[] depths; static long[] totals; public static void main(String[] args) throws Exception { Scanner sc = new Scanner(); int n = sc.nextInt(); for (int i = 0; i < n; i++) { graph.add(new ArrayList<>()); } for (int i = 0; i < n - 1; i++) { int a = sc.nextInt(); int b = sc.nextInt(); graph.get(a).add(b); graph.get(b).add(a); } values = new int[n]; for (int i = 0; i < n; i++) { values[i] = sc.nextInt(); } parents = new int[20][n]; depths = new int[n]; totals = new long[n]; setDepth(0, 0, 0, 0); for (int i = 1; i < 20; i++) { for (int j = 0; j < n; j++) { parents[i][j] = parents[i - 1][parents[i - 1][j]]; } } int m = sc.nextInt(); long ans = 0; while (m-- > 0) { int a = sc.nextInt(); int b = sc.nextInt(); int c = sc.nextInt(); int lca = getLCA(a, b); long current = totals[a] + totals[b] - totals[lca] * 2 + values[lca]; ans += current * c; } System.out.println(ans); } static void setDepth(int idx, int p, int d, long v) { depths[idx] = d; parents[0][idx] = p; totals[idx] = v + values[idx]; for (int x : graph.get(idx)) { if (x != p) { setDepth(x, idx, d + 1, totals[idx]); } } } static int getLCA(int a, int b) { if (depths[a] < depths[b]) { return getLCA(b, a); } for (int i = 19; i >= 0; i--) { if (depths[a] - depths[b] >= (1 << i)) { a = parents[i][a]; } } if (a == b) { return a; } for (int i = 19; i >= 0; i--) { if (parents[i][a] != parents[i][b]) { a = parents[i][a]; b = parents[i][b]; } } return parents[0][a]; } } 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(); } }