A14077. Square-free division (easy version)

This is the easy version of the problem. The only difference is that in this version $k = 0$ .

There is an array $a_1, a_2, \ldots, a_n$ of $n$ positive integers. You should divide it into a minimal number of continuous segments, such that in each segment there are no two numbers (on different positions), whose product is a perfect square.

Moreover, it is allowed to do at most $k$ such operations before the division: choose a number in the array and change its value to any positive integer. But in this version $k = 0$ , so it is not important.

What is the minimum number of continuous segments you should use if you will make changes optimally?

The first line contains a single integer $t$ $(1 \le t \le 1000)$ — the number of test cases.

The first line of each test case contains two integers $n$ , $k$ ( $1 \le n \le 2 \cdot 10^5$ , $k = 0$ ).

The second line of each test case contains $n$ integers $a_1, a_2, \ldots, a_n$ ( $1 \le a_i \le 10^7$ ).

It's guaranteed that the sum of $n$ over all test cases does not exceed $2 \cdot 10^5$ .

For each test case print a single integer — the answer to the problem.

In the first test case the division may be as follows:

- $[18, 6]$
- $[2, 4]$
- $[1]$