Find a Value in a 2D Grid

MEDIUM2D Arrays8 marks

Read a 3×3 grid of integers, then a target value. Output the position of the first match in row-major order, or Not found.

Input: 9 integers (row by row), then the target integer. Output: Found at row <r> column <c> or Not found.

Example:

Input:  1
        2
        3
        4
        5
        6
        7
        8
        9
        5
Output: Found at row 2 column 2

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Sample Test Cases

Test 1: Value in the centre

Inputs: 1, 2, 3, 4, 5, 6, 7, 8, 9, 5

Expected: Found at row 2 column 2

Test 2: Target missing

Inputs: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10

Expected: Not found