結果
問題 |
No.777 再帰的ケーキ
|
ユーザー |
![]() |
提出日時 | 2020-12-16 18:57:35 |
言語 | Java (openjdk 23) |
結果 |
TLE
(最新)
AC
(最初)
|
実行時間 | - |
コード長 | 2,466 bytes |
コンパイル時間 | 2,406 ms |
コンパイル使用メモリ | 80,008 KB |
実行使用メモリ | 92,264 KB |
最終ジャッジ日時 | 2024-09-20 05:15:28 |
合計ジャッジ時間 | 17,800 ms |
ジャッジサーバーID (参考情報) |
judge1 / judge2 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 4 |
other | AC * 32 TLE * 1 |
ソースコード
import java.util.*; import java.io.*; public class Main { public static void main (String[] args) throws Exception { BufferedReader br = new BufferedReader(new InputStreamReader(System.in)); int n = Integer.parseInt(br.readLine()); Cake[] cakes = new Cake[n]; for (int i = 0; i < n; i++) { cakes[i] = new Cake(br.readLine()); } Arrays.sort(cakes); Cake.doCompress(); int size = 1; long max = 0; BinaryIndexedTree bit = new BinaryIndexedTree(Cake.size); for (Cake c : cakes) { int idx = c.getIdx(); long next = bit.getMax(idx - 1) + c.cal; max = Math.max(max, next); bit.set(idx, next); } System.out.println(max); } static class Cake implements Comparable<Cake> { static int size = 1; static TreeMap<Integer, Integer> compress = new TreeMap<>(); static void doCompress() { for (int x : compress.keySet()) { compress.put(x, size); size++; } } int width; int height; int cal; public Cake(int width, int height, int cal) { this.width = width; this.height = height; this.cal = cal; compress.put(height, Integer.MAX_VALUE); } public Cake(String line) { this(line.split(" ", 3)); } public Cake(String[] element) { this(Integer.parseInt(element[0]), Integer.parseInt(element[1]), Integer.parseInt(element[2])); } public int getIdx() { return compress.get(height); } public int compareTo(Cake another) { if (width == another.width) { return another.height - height; } else { return width - another.width; } } } } class BinaryIndexedTree { int size; long[] tree; public BinaryIndexedTree(int size) { this.size = size; tree = new long[size]; } public void set(int idx, long value) { int mask = 1; while (idx < size) { if ((idx & mask) != 0) { tree[idx] = Math.max(tree[idx], value); idx += mask; } mask <<= 1; } } public long getMax(int x) { int mask = 1; long ans = 0; while (x > 0) { if ((x & mask) != 0) { ans = Math.max(ans, tree[x]); x -= mask; } mask <<= 1; } return ans; } }