BZOJ 4300: 绝世好题

 1 import java.util.Arrays;
 2 import java.util.Scanner;
 3  
 4 public class Main {
 5      
 6     public static void main(String args[]) {
 7          
 8         Scanner in = new Scanner(System.in);
 9          
10         int n = in.nextInt();
11         int f[] = new int[35];
12          
13         Arrays.fill(f, 0);
14          
15         for (int i = 1; i <= n; ++i) {
16              
17             int num = in.nextInt(), tmp = 0;
18              
19             for (int j = 0; j <= 30; ++j)
20                 if (((num >> j) & 1) == 1)
21                     tmp = Math.max(tmp, f[j]);
22              
23             for (int j = 0; j <= 30; ++j)
24                 if (((num >> j) & 1) == 1)
25                     f[j] = Math.max(f[j], tmp + 1);
26          
27         }
28          
29         int ans = 0;
30          
31         for (int i = 0; i <= 30; ++i)
32             ans = Math.max(ans, f[i]);
33          
34         System.out.println(ans);
35          
36         in.close();
37          
38     }
39  
40 }