Solutions:
Check these solutions from our community and artificial intelligence:
The candidate's solution is a depth first search algorithm that starts at the top left corner of the array and searches for the longest path. If the algorithm finds a path that is longer than the current longest path, it will update the longest path. The algorithm will continue to search for the longest path until it has visited every cell in the array. The algorithm will then return the longest path.
The solution is complete and solves the problem. The approach is general and could be applied to other problems.