結果
問題 | No.497 入れ子の箱 |
ユーザー |
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提出日時 | 2023-01-30 20:12:18 |
言語 | Java (openjdk 23) |
結果 |
AC
|
実行時間 | 177 ms / 5,000 ms |
コード長 | 2,977 bytes |
コンパイル時間 | 2,541 ms |
コンパイル使用メモリ | 84,588 KB |
実行使用メモリ | 60,604 KB |
最終ジャッジ日時 | 2024-06-30 05:26:19 |
合計ジャッジ時間 | 7,904 ms |
ジャッジサーバーID (参考情報) |
judge1 / judge5 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 3 |
other | AC * 29 |
ソースコード
import java.io.*;import java.util.*;import java.util.stream.*;public class Main {static Box[] boxes;static int[][] dp;public static void main(String[] args) throws Exception {Scanner sc = new Scanner();int n = sc.nextInt();boxes = new Box[n + 1];for (int i = 0; i < n; i++) {boxes[i] = new Box(sc.nextInt(), sc.nextInt(), sc.nextInt());}boxes[n] = new Box(Integer.MAX_VALUE, Integer.MAX_VALUE, Integer.MAX_VALUE);Arrays.sort(boxes);dp = new int[n][n + 1];for (int[] arr : dp) {Arrays.fill(arr, -1);}System.out.println(dfw(n - 1, n));}static int dfw(int idx, int b) {if (idx < 0) {return 0;}if (dp[idx][b] < 0) {dp[idx][b] = dfw(idx - 1, b);if (boxes[idx].isSmaller(boxes[b])) {dp[idx][b] = Math.max(dp[idx][b], dfw(idx - 1, idx) + 1);}}return dp[idx][b];}static class Box implements Comparable<Box> {int[] arr;public Box(int a, int b, int c) {arr = new int[]{a, b, c};Arrays.sort(arr);}public int compareTo(Box another) {for (int i = 2; i >= 0; i--) {if (arr[i] != another.arr[i]) {return arr[i] - another.arr[i];}}return 0;}public boolean isSmaller(Box another) {for (int i = 0; i < 3; i++) {if (arr[i] >= another.arr[i]) {return false;}}return true;}}}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();}}