CF1847F.The Boss's Identity

While tracking Diavolo's origins, Giorno receives a secret code from Polnareff. The code can be represented as an infinite sequence of positive integers: $a_1, a_2, \dots $ . Giorno immediately sees the pattern behind the code. The first $n$ numbers $a_1, a_2, \dots, a_n$ are given. For $i > n$ the value of $a_i$ is $(a_{i-n}\ |\ a_{i-n+1})$ , where $|$ denotes the bitwise OR operator.

Pieces of information about Diavolo are hidden in $q$ questions. Each question has a positive integer $v$ associated with it and its answer is the smallest index $i$ such that $a_i > v$ . If no such $i$ exists, the answer is $-1$ . Help Giorno in answering the questions!

Each test contains multiple test cases. The first line contains the number of test cases $t$ ( $1 \le t \le 10\,000$ ). The description of the test cases follows.

The first line of each test case contains two integers $n$ and $q$ ( $2 \leq n \leq 2 \cdot 10^5$ , $1 \leq q \leq 2 \cdot 10^5$ ).

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 parts of the code which define the pattern.

The $i$ -th line of the next $q$ lines contain a single integer $v_i$ ( $0 \leq v_i \leq 10^9$ ) — the question Giorno asks you.

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

Print $q$ numbers. The $i$ -th number is the answer to the $i$ -th question asked by Giorno.

In the first test case, $a = [2,1,3,3,\ldots]$ .

• For the first question, $a_1=2$ is the element with the smallest index greater than $1$ .
• For the second question, $a_3=3$ is the element with the smallest index greater than $2$ .
• For the third question, there is no index $i$ such that $a_i > 3$ .