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Easy Accuracy: 59.41% Submissions: 10103 Points: 2

Given a Matrix mat of N*N size, the task is to complete the function constructLinkedMatrix(), that constructs a 2D linked list representation of the given matrix.

Input : 2D matrix
1 2 3
4 5 6
7 8 9

Output :
1 -> 2 -> 3 -> NULL
|    |    |
v    v    v
4 -> 5 -> 6 -> NULL
|    |    |
v    v    v
7 -> 8 -> 9 -> NULL
|    |    |
v    v    v
NULL NULL NULL

Input:
The fuction takes 2 argument as input, first the 2D matrix mat[][] and second an integer variable N, denoting the size of the matrix.
There will be T test cases and for each test case the function will be called separately.

Output:
The function must return the reference pointer to the head of the linked list.

Constraints:
1<=T<=100
1<=N<=150

Example:
Input:

2
3
1 2 3 4 5 6 7 8 9
2
1 2 3 4

Output:
1 2 3 4 5 6 7 8 9
1 2 3 4

Note:The Input/Ouput format and Example given are used for system's internal purpose, and should be used by a user for Expected Output only. As it is a function problem, hence a user should not read any input from stdin/console. The task is to complete the function specified, and not to write the full code.