Given a **N x N** matrix where every cell has some number of coins. Count number of ways to reach bottom right cell of matrix from top left cell with exactly **K** coins. We can move to (i+1, j) or (i, j+1) from a cell (i, j).

**Input:**

First line contains number of test cases T. For each test case, first line contains the integer value '**X**' denoting coins, second line contains an integer 'N' denoting the order of square matrix. Last line contains N x N elements in a single line in row-major order.

**Output:**

Output the number of paths possible.

**Constraints:**

1 <=T<= 500

1 <= K <= 200

1 <= N <= 200

1 <= A_{i} <= 200

**Example:
Input:**

2

16

3

1 2 3 4 6 5 9 8 7

12

3

1 2 3 4 6 5 3 2 1

**Output:**

0

2

**Explanation:**

**Testcase 2:** There are 2 possible paths with exactly K coins, which are (1 + 4 + 3 + 2 + 1) and (1 + 2 + 3 + 5 + 1).

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