Codeforces Round 882 (Div. 2)
B
Hamon Odyssey
Codeforces
1000
原题
← AC →
翻译中…

Jonathan is fighting against DIO's Vampire minions. There are $n$ of them with strengths $a_1, a_2, \dots, a_n$. $\def\and {{\,\texttt{&}\,}}$

翻译中…

Denote $(l, r)$ as the group consisting of the vampires with indices from $l$ to $r$. Jonathan realizes that the strength of any such group is in its weakest link, that is, the bitwise AND. More formally, the strength level of the group $(l, r)$ is defined as $$f(l,r) = a_l \and a_{l+1} \and a_{l+2} \and \ldots \and a_r.$$ Here, $\and$ denotes the bitwise AND operation.

翻译中…

Because Jonathan would like to defeat the vampire minions fast, he will divide the vampires into contiguous groups, such that each vampire is in exactly one group, and the sum of strengths of the groups is minimized. Among all ways to divide the vampires, he would like to find the way with the maximum number of groups.

翻译中…

Given the strengths of each of the $n$ vampires, find the maximum number of groups among all possible ways to divide the vampires with the smallest sum of strengths.

翻译中…

Input

翻译中…

The first line contains a single integer $t$ $(1 \leq t \leq 10^4)$ — the number of test cases. The description of test cases follows.

翻译中…

The first line of each test case contains a single integer $n$ ($1 \leq n \leq 2 \cdot 10^5$) — the number of vampires.

翻译中…

The second line of each test case contains $n$ integers $a_1,a_2,\ldots,a_n$ ($0 \leq a_i \leq 10^9$) — the individual strength of each vampire.

翻译中…

The sum of $n$ over all test cases does not exceed $2 \cdot 10^5$.

翻译中…

Output

翻译中…

For each test case, output a single integer — the maximum number of groups among all possible ways to divide the vampires with the smallest sum of strengths.

翻译中…

Note

翻译中…

In the first test case, the optimal way is to take all the $n$ vampires as a group. So, $f(1,3) = 1 \and 2 \and 3 = 0$.

翻译中…

In the second test case, the optimal way is to make $2$ groups, $(2,3,1)$ and $(5,2)$. So, $f(1,3) + f(4,5) = (2 \and 3 \and 1) + (5 \and 2) = 0 + 0 = 0$.

翻译中…

样例

Input #1
3
3
1 2 3
5
2 3 1 5 2
4
5 7 12 6
Output #1
1
2
1
InputCopy OutputCopy
题目信息
题号
1847B
时间限制
1 s
内存限制
256 MB
标签
位运算
贪心
双指针

题面与样例版权归 Codeforces 及出题人所有;中文翻译由 AI 生成(CI 管线),如有出入请以原文为准。