Problem: Reach the End in Time

You are given a 2-D grid consisting of some blocked cells (represented as '#') and some unblocked cells (represented as '.'). The pointer starts at the top-left corner of the grid. It is guaranteed that the starting position is in an unblocked cell, and the bottom-right corner is also unblocked.

Each cell in the grid is connected to its adjacent cells on the right, left, top, and bottom (if those cells exist). It takes 1 second for the pointer to move from one cell to an adjacent cell. Your task is to determine whether the pointer can reach the bottom-right corner of the grid within the given time constraint maxTime seconds.

If the pointer can reach the bottom-right corner within maxTime seconds, return the string 'Yes'. Otherwise, return 'No'.

Function Description

Complete the function reachTheEnd in the editor.

Function Signature:

def reachTheEnd(grid: List[str], maxTime: int) -> str:

Parameters:

• grid (List[str]): A list of strings representing the rows of the grid, where each string represents a row in the grid.
• maxTime (int): An integer representing the maximum time allowed to reach the bottom-right corner of the grid.

Output:

• Return a string: "Yes" if the pointer can reach the bottom-right corner within maxTime seconds, otherwise return "No".

Example 1:

Input:

grid = ["..#", "#.##", "#..."]
maxTime = 5

Output:

"Yes"

Explanation:

..#
#.##
#...

It will take the pointer 5 seconds to reach the bottom-right corner. As long as maxTime >= 5, return 'Yes'.

Example 2:

Input:

grid = ["..", ".."]
maxTime = 3

Output:

"Yes"

Explanation:

..
..

The grid has 2 rows and 2 columns, and the time within which the pointer needs to reach the bottom-right cell is 3 seconds. Starting from the top-left cell, the pointer can either move to the top-right unblocked cell or bottom-left unblocked cell, and then to the bottom-right cell. It takes 2 seconds to reach the bottom-right cell on either path. Thus, the pointer reaches the bottom-right cell within 3 seconds, so the answer is "Yes".

Example 3:

Input:

grid = [".#", "#."]
maxTime = 2

Output:

"No"

Explanation:

.#
#.

The grid has 2 rows and 2 columns, and the time within which the pointer needs to reach the bottom-right cell is 2 seconds. It can neither move to the top-right cell nor to the bottom-left cell in 2 seconds, so the pointer cannot reach the bottom-right cell within the time limit. Therefore, the output is "No".

Constraints:

• 1 ≤ rows ≤ 500
• 1 ≤ maxTime ≤ 100,000

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This version of the problem presents the task without LaTeX and focuses on explaining the input/output format and the problem's logic in plain text.

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