How should I practice Minesweeper Board Update?

Start by reading the full statement, solve the visible examples, then compare the pattern against related Uber onsite interview problems in FastPrep.

Is Minesweeper Board Update associated with Uber?

FastPrep tags this as a Uber onsite interview coding practice problem when the problem catalog has that company and stage context.

Problem · Array

Minesweeper Board Update

Learn this problem

● Medium

UberFULLTIMEONSITE INTERVIEW

See Uber hiring insights

Problem statement

You are given a rectangular Minesweeper board containing unrevealed empty cells E and unrevealed mines M, plus a clicked coordinate [row, column].

If the clicked cell is a mine, change it to X and return the board.
Otherwise reveal the clicked empty region. For an unrevealed empty cell, count mines in all eight neighboring positions.
If the count is positive, replace the cell with the digit 1 through 8 and do not expand through it.
If the count is zero, replace the cell with B and continue revealing all adjacent unrevealed empty cells.

Mutate and return the board after the click.

Function

updateBoard(board: char[][], click: int[]) → char[][]

Examples

Example 1

board = [["E","E","E","E","E"],["E","E","M","E","E"],["E","E","E","E","E"],["E","E","E","E","E"]]click = [3,0]return = [["B","1","E","1","B"],["B","1","M","1","B"],["B","1","1","1","B"],["B","B","B","B","B"]]

The click opens a zero-mine region. Numbered boundary cells stop expansion, and the unrevealed cell behind the mine remains E.

Example 2

board = [["M","E"],["E","E"]]click = [0,0]return = [["X","E"],["E","E"]]

Clicking the mine marks only that cell as X.

Example 3

board = [["M","E"],["E","E"]]click = [1,1]return = [["M","E"],["E","1"]]

The clicked cell touches one mine, so it becomes 1 and expansion stops immediately.

Constraints

1 <= board.length, board[0].length <= 300
Every row has the same length.
Each board cell is E or M.
click contains a valid board coordinate.