Submission #696252

#	Time	Username	Problem	Language	Result	Execution time	Memory
696252		nicolexxuu	Longest beautiful sequence (IZhO17_subsequence)	Java	0 / 100	1156 ms	262144 KiB

subsequence

import java.util.*;
import java.io.*;

public class subsequence {
	public static void main(String[] args) throws IOException {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		StringTokenizer st = new StringTokenizer(br.readLine());
		int n = Integer.parseInt(st.nextToken());
		int[] a = new int[n], k = new int[n];
		
		st = new StringTokenizer(br.readLine());
		for(int i = 0; i < n; i++) a[i] = Integer.parseInt(st.nextToken());
		st = new StringTokenizer(br.readLine());
		for(int i = 0; i < n; i++) k[i] = Integer.parseInt(st.nextToken());
		br.close();
		
		int[][][][] dp = new int[1<<10][1<<10][11][2];
		int[][] res = new int[n][2];
		
		for(int i = 0; i < n; i++) {
			int par = -1, ans = 0;
			int l = a[i] >> 10;
			int r = a[i] - (l << 10);
			for(int j = 0; j < (1 << 10); j++) { // possible prev lefts
				int bLeft = k[i] - Integer.bitCount(l&j);
				
				
				if(bLeft >= 0 && bLeft <= 10 ) {
					if(dp[l][r][bLeft][0] > ans) {
						ans = dp[l][r][bLeft][0];
						par = dp[l][r][bLeft][1];
					}
				}
			}
			
			res[i] = new int[] {ans+1, par};
			
			for(int j = 0; j < (1 << 10); j++) {
				int b = Integer.bitCount(j&r);
				if(ans+1 > dp[l][j][b][0]) {
					dp[l][j][b][0] = ans+1;
					dp[l][j][b][1] = i;
				}
			}
		}
		
		
		int idx = 0;
		for(int i = 0; i < n; i++) idx = (res[i][0] > res[idx][0]) ? i : idx;
		System.out.println(res[idx][0]);
		ArrayDeque<Integer> l = new ArrayDeque<>();
		while(idx != -1) {
			l.add(idx);
			idx = res[idx][1];
		}
		
		StringBuilder sb = new StringBuilder("");
		while(!l.isEmpty()) sb.append(l.pollLast()+1).append(" ");
		System.out.println(sb);
	}
}


/*
4
1 2 3 4
10 0 1 0

5
5 3 5 3 5
10 1 20 1 20
*/

• Subtask 1: 0 / 7
• Subtask 2: 0 / 16
• Subtask 3: 0 / 17
• Subtask 4: 0 / 60