結果

問題 No.686 Uncertain LIS
ユーザー uwiuwi
提出日時 2018-05-11 23:47:56
言語 Java21
(openjdk 21)
結果
AC  
実行時間 467 ms / 2,000 ms
コード長 9,895 bytes
コンパイル時間 4,230 ms
コンパイル使用メモリ 90,660 KB
実行使用メモリ 57,832 KB
最終ジャッジ日時 2024-05-08 00:28:43
合計ジャッジ時間 15,021 ms
ジャッジサーバーID
（参考情報） 		judge5 / judge3
このコードへのチャレンジ
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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 46 ms
37,228 KB
testcase_01 AC 47 ms
37,100 KB
testcase_02 AC 48 ms
37,044 KB
testcase_03 AC 48 ms
36,940 KB
testcase_04 AC 48 ms
36,972 KB
testcase_05 AC 46 ms
37,204 KB
testcase_06 AC 47 ms
37,216 KB
testcase_07 AC 46 ms
36,944 KB
testcase_08 AC 48 ms
37,196 KB
testcase_09 AC 409 ms
49,832 KB
testcase_10 AC 459 ms
57,832 KB
testcase_11 AC 337 ms
48,816 KB
testcase_12 AC 95 ms
39,636 KB
testcase_13 AC 220 ms
46,072 KB
testcase_14 AC 268 ms
46,064 KB
testcase_15 AC 219 ms
45,404 KB
testcase_16 AC 384 ms
47,504 KB
testcase_17 AC 440 ms
50,208 KB
testcase_18 AC 467 ms
49,872 KB
testcase_19 AC 454 ms
54,604 KB
testcase_20 AC 450 ms
48,044 KB
testcase_21 AC 442 ms
48,348 KB
testcase_22 AC 309 ms
48,528 KB
testcase_23 AC 305 ms
48,272 KB
testcase_24 AC 228 ms
43,860 KB
testcase_25 AC 200 ms
42,872 KB
testcase_26 AC 358 ms
55,960 KB
testcase_27 AC 309 ms
57,288 KB
testcase_28 AC 308 ms
49,692 KB
testcase_29 AC 296 ms
50,148 KB
testcase_30 AC 325 ms
53,832 KB
testcase_31 AC 46 ms
37,172 KB
testcase_32 AC 369 ms
56,720 KB
testcase_33 AC 341 ms
56,096 KB
testcase_34 AC 452 ms
50,140 KB
testcase_35 AC 462 ms
50,168 KB
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ソースコード

diff # 

package contest180511;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import java.util.Arrays;
import java.util.InputMismatchException;
import java.util.Random;

public class E {
	InputStream is;
	PrintWriter out;
	String INPUT = "";
	
	void solve()
	{
		int n = ni();
		int[][] rs = new int[n][];
		for(int i = 0;i < n;i++){
			rs[i] = new int[]{ni(), ni()};
		}
		Node root = null;
		root = new Node(0);
		for(int[] q : rs){
			int l = q[0], r = q[1];
			int fl = lowerBound(root, l);
			int fr = lowerBound(root, r);
			if(fl < fr){
				Node[] lm_r = split(root, fr);
				Node[] l_m = split(lm_r[0], fl);
				Node M = l_m[1];
				add(M, 0, count(M), 1);
				root = merge(merge(merge(l_m[0], new Node(l)), M), split(lm_r[1], 1)[1]);
			}else{
				Node nf = get(root, fl);
				if(nf != null){
					nf.v = l;
					while(nf != null){
						update(nf);
						nf = nf.parent;
					}
				}else{
					root = merge(root, new Node(l));
				}
			}
			
			// a[low] < L a[low+1] := L
			// a[x+1] = a[x] + 1
		}
		out.println(count(root)-1);
	}
	
	public static int lowerBound(Node a, int q)
	{
		int lcount = 0;
		while(a != null){
			fall(a);
			if(a.v >= q){
				a = a.left;
			}else{
				lcount += count(a.left) + 1;
				a = a.right;
			}
		}
		return lcount;
	}
	
	public static Random gen = new Random();
	
	static public class Node
	{
		public int v; // value
		public long priority;
		public Node left, right, parent;
		
		public int count;
		
		public int add; // add cover
		public int min; 
		
		public Node(int v)
		{
			this.v = v;
			priority = gen.nextLong();
			update(this);
		}
		
		@Override
		public String toString() {
			StringBuilder builder = new StringBuilder();
			builder.append("Node [v=");
			builder.append(v);
			builder.append(", count=");
			builder.append(count);
			builder.append(", parent=");
			builder.append(parent != null ? parent.v : "null");
			builder.append(", add=");
			builder.append(add);
			builder.append(", min=");
			builder.append(min);
			builder.append("]");
			return builder.toString();
		}
	}

	public static Node update(Node a)
	{
		if(a == null)return null;
		a.count = 1;
		if(a.left != null)a.count += a.left.count;
		if(a.right != null)a.count += a.right.count;
		
		a.min = a.v;
		if(a.left != null)a.min = Math.min(a.left.min+a.add, a.min);
		if(a.right != null)a.min = Math.min(a.right.min+a.add, a.min);
		return a;
	}
	
	public static Node disconnect(Node a)
	{
		if(a == null)return null;
		a.left = a.right = a.parent = null;
		return update(a);
	}
	
	public static Node root(Node x)
	{
		if(x == null)return null;
		while(x.parent != null)x = x.parent;
		return x;
	}
	
	public static int count(Node a)
	{
		return a == null ? 0 : a.count;
	}
	
	public static void setParent(Node a, Node par)
	{
		if(a != null)a.parent = par;
	}
	
	public static int min(Node a, int L, int R)
	{
		if(a == null || L >= R || L >= count(a) || R <= 0)return Integer.MAX_VALUE / 2;
		if(L <= 0 && R >= count(a)){
			return a.min;
		}else{
			int lmin = min(a.left, L, R);
			int rmin = min(a.right, L-count(a.left)-1, R-count(a.left)-1);
			int min = Math.min(lmin, rmin) + a.add;
			if(L <= count(a.left) && count(a.left) < R)min = Math.min(min, a.v);
			return min;
		}
	}
	
	public static void add(Node a, int L, int R, int V)
	{
		if(a == null || L >= R || L >= count(a) || R <= 0)return;
		if(L <= 0 && R >= count(a)){
			a.v += V;
			a.add += V;
		}else{
			add(a.left, L, R, V);
			add(a.right, L-count(a.left)-1, R-count(a.left)-1, V);
			if(L <= count(a.left) && count(a.left) < R)a.v += V;
		}
		update(a);
	}
	
	public static void fall(Node a)
	{
		if(a == null)return;
		if(a.left != null){
			a.left.add += a.add;
			a.left.v += a.add;
			update(a.left);
		}
		if(a.right != null){
			a.right.add += a.add;
			a.right.v += a.add;
			update(a.right);
		}
		a.add = 0;
		update(a);
	}
	
	public static Node merge(Node a, Node b)
	{
		if(b == null)return a;
		if(a == null)return b;
		if(a.priority > b.priority){
			fall(a);
			setParent(a.right, null);
			setParent(b, null);
			a.right = merge(a.right, b);
			setParent(a.right, a);
			return update(a);
		}else{
			fall(b);
			setParent(a, null);
			setParent(b.left, null);
			b.left = merge(a, b.left);
			setParent(b.left, b);
			return update(b);
		}
	}
	
	// [0,K),[K,N)
	public static Node[] split(Node a, int K)
	{
		if(a == null)return new Node[]{null, null};
		fall(a);
		if(K <= count(a.left)){
			setParent(a.left, null);
			Node[] s = split(a.left, K);
			a.left = s[1];
			setParent(a.left, a);
			s[1] = update(a);
			return s;
		}else{
			setParent(a.right, null);
			Node[] s = split(a.right, K-count(a.left)-1);
			a.right = s[0];
			setParent(a.right, a);
			s[0] = update(a);
			return s;
		}
	}
	
	public static Node insert(Node a, int K, Node b)
	{
		if(a == null)return b;
		fall(a);
		if(b.priority < a.priority){
			if(K <= count(a.left)){
				a.left = insert(a.left, K, b);
				setParent(a.left, a);
			}else{
				a.right = insert(a.right, K-count(a.left)-1, b);
				setParent(a.right, a);
			}
			return update(a);
		}else{
			Node[] ch = split(a, K);
			b.left = ch[0]; b.right = ch[1];
			setParent(b.left, b);
			setParent(b.right, b);
			return update(b);
		}
	}
	
	// delete K-th
	public static Node erase(Node a, int K)
	{
		if(a == null)return null;
		if(K < count(a.left)){
			a.left = erase(a.left, K);
			setParent(a.left, a);
			return update(a);
		}else if(K == count(a.left)){
			fall(a);
			setParent(a.left, null);
			setParent(a.right, null);
			Node aa = merge(a.left, a.right);
			disconnect(a);
			return aa;
		}else{
			a.right = erase(a.right, K-count(a.left)-1);
			setParent(a.right, a);
			return update(a);
		}
	}
	
	public static Node get(Node a, int K)
	{
		while(a != null){
			fall(a);
			if(K < count(a.left)){
				a = a.left;
			}else if(K == count(a.left)){
				break;
			}else{
				K = K - count(a.left)-1;
				a = a.right;
			}
		}
		return a;
	}
	
	static Node[] Q = new Node[100];
	public static Node update(Node a, int K, int v)
	{
		int p = 0;
		while(a != null){
			Q[p++] = a;
			if(K < count(a.left)){
				a = a.left;
			}else if(K == count(a.left)){
				break;
			}else{
				K = K - count(a.left)-1;
				a = a.right;
			}
		}
		a.v = v;
		while(p > 0){
			update(Q[--p]);
		}
		return a;
	}
	
	public static int index(Node a)
	{
		if(a == null)return -1;
		int ind = count(a.left);
		while(a != null){
			Node par = a.parent;
			if(par != null && par.right == a){
				ind += count(par.left) + 1;
			}
			a = par;
		}
		return ind;
	}
	
	public static Node[] nodes(Node a) { return nodes(a, new Node[count(a)], 0, count(a)); }
	public static Node[] nodes(Node a, Node[] ns, int L, int R)
	{
		if(a == null)return ns;
		nodes(a.left, ns, L, L+count(a.left));
		ns[L+count(a.left)] = a;
		nodes(a.right, ns, R-count(a.right), R);
		return ns;
	}
	
	public static String toString(Node a, String indent)
	{
		if(a == null)return "";
		StringBuilder sb = new StringBuilder();
		sb.append(toString(a.left, indent + "  "));
		sb.append(indent).append(a).append("\n");
		sb.append(toString(a.right, indent + "  "));
		return sb.toString();
	}


	
	void run() throws Exception
	{
		is = INPUT.isEmpty() ? System.in : new ByteArrayInputStream(INPUT.getBytes());
		out = new PrintWriter(System.out);
		
		long s = System.currentTimeMillis();
		solve();
		out.flush();
		if(!INPUT.isEmpty())tr(System.currentTimeMillis()-s+"ms");
//		Thread t = new Thread(null, null, "~", Runtime.getRuntime().maxMemory()){
//			@Override
//			public void run() {
//				long s = System.currentTimeMillis();
//				solve();
//				out.flush();
//				if(!INPUT.isEmpty())tr(System.currentTimeMillis()-s+"ms");
//			}
//		};
//		t.start();
//		t.join();
	}
	
	public static void main(String[] args) throws Exception { new E().run(); }
	
	private byte[] inbuf = new byte[1024];
	public int lenbuf = 0, ptrbuf = 0;
	
	private int readByte()
	{
		if(lenbuf == -1)throw new InputMismatchException();
		if(ptrbuf >= lenbuf){
			ptrbuf = 0;
			try { lenbuf = is.read(inbuf); } catch (IOException e) { throw new InputMismatchException(); }
			if(lenbuf <= 0)return -1;
		}
		return inbuf[ptrbuf++];
	}
	
	private boolean isSpaceChar(int c) { return !(c >= 33 && c <= 126); }
	private int skip() { int b; while((b = readByte()) != -1 && isSpaceChar(b)); return b; }
	
	private double nd() { return Double.parseDouble(ns()); }
	private char nc() { return (char)skip(); }
	
	private String ns()
	{
		int b = skip();
		StringBuilder sb = new StringBuilder();
		while(!(isSpaceChar(b))){ // when nextLine, (isSpaceChar(b) && b != ' ')
			sb.appendCodePoint(b);
			b = readByte();
		}
		return sb.toString();
	}
	
	private char[] ns(int n)
	{
		char[] buf = new char[n];
		int b = skip(), p = 0;
		while(p < n && !(isSpaceChar(b))){
			buf[p++] = (char)b;
			b = readByte();
		}
		return n == p ? buf : Arrays.copyOf(buf, p);
	}
	
	private int[] na(int n)
	{
		int[] a = new int[n];
		for(int i = 0;i < n;i++)a[i] = ni();
		return a;
	}
	
	private long[] nal(int n)
	{
		long[] a = new long[n];
		for(int i = 0;i < n;i++)a[i] = nl();
		return a;
	}
	
	private char[][] nm(int n, int m) {
		char[][] map = new char[n][];
		for(int i = 0;i < n;i++)map[i] = ns(m);
		return map;
	}
	
	private int[][] nmi(int n, int m) {
		int[][] map = new int[n][];
		for(int i = 0;i < n;i++)map[i] = na(m);
		return map;
	}
	
	private int ni() { return (int)nl(); }
	
	private long nl()
	{
		long num = 0;
		int b;
		boolean minus = false;
		while((b = readByte()) != -1 && !((b >= '0' && b <= '9') || b == '-'));
		if(b == '-'){
			minus = true;
			b = readByte();
		}
		
		while(true){
			if(b >= '0' && b <= '9'){
				num = num * 10 + (b - '0');
			}else{
				return minus ? -num : num;
			}
			b = readByte();
		}
	}
	
	private static void tr(Object... o) { System.out.println(Arrays.deepToString(o)); }
}
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