The first line contains an integer , the number of test cases.. Each of the test cases is represented as follows: The first line contains two space-separated integers and , the number of rows in the search grid and the length of each row string. This is followed by lines, each with a string of digits that represent the grid . The following line contains two space-separated integers, and , the. 2015. 4. 8. · I’ve written an answer for The Grid Search challenge on HackerRank. Please let me know of any improvements that can be made to my implementation (specifically if there's any way to make the algorithm more efficient. I'd like to make this algorithm optimal). P.S: My implementation is a brute force algorithm, and I reckon that there's a much better way of.