A regular bracket sequence is a sequence consisting of '(' and ')', which can be turned into a valid math expression by inserting $$$1$$$ and $$$+$$$ any number of times into the sequence. For example, the sequence "()(()())" is a regular bracket sequence, while "())(()" or "(()" are not regular bracket sequences.

You are given a regular bracket sequence $$$S$$$.

Let us consider shifting a subsequence$$$^{\text{∗}}$$$ to the right. Formally, when a subsequence $$$S_{i_1} S_{i_2} \ldots S_{i_k}$$$ is shifted to the right, the characters on the chosen indices simultaneously get reassigned as follows:

$$$S_{i_1} \leftarrow S_{i_k}$$$;
$$$S_{i_2} \leftarrow S_{i_1}$$$;
$$$S_{i_3} \leftarrow S_{i_2}$$$;
$$$\ldots$$$
$$$S_{i_k} \leftarrow S_{i_{k-1}}$$$.

In other words, the element of the $$$j$$$-th chosen index gets reassigned to the $$$((j-2) \bmod k + 1)$$$-th chosen character.

For example, when $$$S$$$ is "()(()())", shifting the subsequence $$$S_2 S_4$$$ changes $$$S$$$ to "((())())". On the other hand, shifting $$$S_2 S_3 S_5$$$ changes $$$S$$$ to "())((())".

Please count how many non-empty subsequences make $$$S$$$ remain regular when shifted to the right. As the answer may be huge, you are only asked to output the answer modulo $$$998\,244\,353$$$.

$$$^{\text{∗}}$$$A sequence $$$a$$$ is a subsequence of a sequence $$$b$$$ if $$$a$$$ can be obtained from $$$b$$$ by the deletion of several (possibly, zero or all) element from arbitrary positions. Two subsequences are considered different if the sets of positions of the deleted elements are different.

Input

Each test contains multiple test cases. The first line contains the number of test cases $$$t$$$ ($$$1 \le t \le 10^4$$$). The description of the test cases follows.

The first line of each test case contains a single integer $$$n$$$ ($$$2 \le n \le 300\,000$$$, $$$n$$$ is even).

The second line of each test case contains a regular bracket sequence $$$S$$$ of length $$$n$$$ given as a string without spaces.

It is guaranteed that the sum of $$$n$$$ over all test cases does not exceed $$$300\,000$$$.

Output

For each test case, output the answer modulo $$$998\,244\,353$$$ on a separate line.

Note

For the second test case, the $$$8$$$ non-empty subsequences that make $$$S$$$ remain regular when shifted to the right are as follows:

$$$S_1$$$: changes $$$S$$$ to "()()";
$$$S_2$$$: changes $$$S$$$ to "()()";
$$$S_3$$$: changes $$$S$$$ to "()()";
$$$S_4$$$: changes $$$S$$$ to "()()";
$$$S_1 S_3$$$: changes $$$S$$$ to "()()";
$$$S_2 S_3$$$: changes $$$S$$$ to "(())";
$$$S_2 S_4$$$: changes $$$S$$$ to "()()";
$$$S_1 S_2 S_3$$$: changes $$$S$$$ to "(())".

Rigged Bracket Sequence

Examples