結果
| 問題 | No.417 チューリップバブル |
| ユーザー |
 Grenache
|
| 提出日時 | 2017-01-08 19:23:02 |
| 言語 | Java (openjdk 23) |
| 結果 |
AC
|
| 実行時間 | 1,255 ms / 2,000 ms |
| コード長 | 5,264 bytes |
| コンパイル時間 | 4,223 ms |
| コンパイル使用メモリ | 81,516 KB |
| 実行使用メモリ | 55,348 KB |
| 最終ジャッジ日時 | 2024-12-17 18:14:52 |
| 合計ジャッジ時間 | 22,526 ms |
|
ジャッジサーバーID （参考情報） |
judge5 / judge4 |
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| ファイルパターン | 結果 |
|---|---|
| other | AC * 40 |
ソースコード
import java.io.*;import java.util.*;public class Main_yukicoder417 {private static Scanner sc;private static Printer pr;private static void solve() {int n = sc.nextInt();int m = sc.nextInt();int[] u = new int[n];for (int i = 0; i < n; i++) {u[i] = sc.nextInt();}List<List<Edge>> edges = new ArrayList<>();for (int i = 0; i < n; i++) {edges.add(new ArrayList<>());}for (int i = 0; i < n - 1; i++) {int a = sc.nextInt();int b = sc.nextInt();int c = sc.nextInt();edges.get(a).add(new Edge(a, b, c));edges.get(b).add(new Edge(b, a, c));}boolean[] used = new boolean[n];int[] p = new int[n];Arrays.fill(p, -1);p[0] = 0;int[][] dp = new int[n][m + 1];Deque<Integer> st = new ArrayDeque<>();st.push(0);while (!st.isEmpty()) {int e = st.peek();if (used[e]) {st.pop();Arrays.fill(dp[e], u[e]);for (Edge next : edges.get(e)) {if (next.v != p[e]) {for (int i = m; i - next.w * 2 >= 0; i--) {for (int j = 0; i - next.w * 2 - j >= 0; j++) {dp[e][i] = Math.max(dp[e][i], dp[e][i - next.w * 2 - j] + dp[next.v][j]);}}}}continue;}for (Edge next : edges.get(e)) {if (next.v != p[e]) {st.push(next.v);p[next.v] = e;}}used[e] = true;}pr.println(dp[0][m]);}private static class Edge {@SuppressWarnings("unused")int u; // fromint v; // toint w; // costEdge(int u, int v, int w) {this.u = u;this.v = v;this.w = w;}}// ---------------------------------------------------public static void main(String[] args) {sc = new Scanner(System.in);pr = new Printer(System.out);solve();pr.close();sc.close();}@SuppressWarnings("unused")private static class Scanner {BufferedReader br;Scanner (InputStream in) {br = new BufferedReader(new InputStreamReader(in));}private boolean isPrintable(int ch) {return ch >= '!' && ch <= '~';}private boolean isCRLF(int ch) {return ch == '\n' || ch == '\r' || ch == -1;}private int nextPrintable() {try {int ch;while (!isPrintable(ch = br.read())) {if (ch == -1) {throw new NoSuchElementException();}}return ch;} catch (IOException e) {throw new NoSuchElementException();}}String next() {try {int ch = nextPrintable();StringBuilder sb = new StringBuilder();do {sb.appendCodePoint(ch);} while (isPrintable(ch = br.read()));return sb.toString();} catch (IOException e) {throw new NoSuchElementException();}}int nextInt() {try {// parseInt from Integer.parseInt()boolean negative = false;int res = 0;int limit = -Integer.MAX_VALUE;int radix = 10;int fc = nextPrintable();if (fc < '0') {if (fc == '-') {negative = true;limit = Integer.MIN_VALUE;} else if (fc != '+') {throw new NumberFormatException();}fc = br.read();}int multmin = limit / radix;int ch = fc;do {int digit = ch - '0';if (digit < 0 || digit >= radix) {throw new NumberFormatException();}if (res < multmin) {throw new NumberFormatException();}res *= radix;if (res < limit + digit) {throw new NumberFormatException();}res -= digit;} while (isPrintable(ch = br.read()));return negative ? res : -res;} catch (IOException e) {throw new NoSuchElementException();}}long nextLong() {try {// parseLong from Long.parseLong()boolean negative = false;long res = 0;long limit = -Long.MAX_VALUE;int radix = 10;int fc = nextPrintable();if (fc < '0') {if (fc == '-') {negative = true;limit = Long.MIN_VALUE;} else if (fc != '+') {throw new NumberFormatException();}fc = br.read();}long multmin = limit / radix;int ch = fc;do {int digit = ch - '0';if (digit < 0 || digit >= radix) {throw new NumberFormatException();}if (res < multmin) {throw new NumberFormatException();}res *= radix;if (res < limit + digit) {throw new NumberFormatException();}res -= digit;} while (isPrintable(ch = br.read()));return negative ? res : -res;} catch (IOException e) {throw new NoSuchElementException();}}float nextFloat() {return Float.parseFloat(next());}double nextDouble() {return Double.parseDouble(next());}String nextLine() {try {int ch;while (isCRLF(ch = br.read())) {if (ch == -1) {throw new NoSuchElementException();}}StringBuilder sb = new StringBuilder();do {sb.appendCodePoint(ch);} while (!isCRLF(ch = br.read()));return sb.toString();} catch (IOException e) {throw new NoSuchElementException();}}void close() {try {br.close();} catch (IOException e) {// throw new NoSuchElementException();}}}private static class Printer extends PrintWriter {Printer(PrintStream out) {super(out);}}}