CCO Preparation Test 6 P2 - An Easy Problem

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Points: 12 (partial)
Time limit: 0.6s
Memory limit: 32M

Problem type
Allowed languages
C, C++, Java, Pascal

Given an array A with N non-negative integers a_i (1 \le i \le N), find the longest subsequence B, where b_i \mathbin{\&} b_{i-1} is not 0.

NOTE: \& is the bitwise and operation. A subsequence is a sequence that can be derived from another sequence by deleting some elements without changing the order of the remaining elements. The two adjacent elements in the subsequence B don't have to be consecutive in the original array A.

Input Specification

The first line consists of one integer N (1 \le N \le 100\,000).

The second line consists of N non-negative integers, a_i (0 \le a_i \le 10^9).

Output Specification

One integer, the longest length of the subsequence B.

Sample Input 1

1 2 3 4

Sample Output 1


Sample Input 2

1 2 1 2 1 2 1 4

Sample Output 2



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