How should I practice Connect Four from the Last Move?

Start by reading the full statement, solve the visible examples, then compare the pattern against related Snowflake phone screen problems in FastPrep.

Is Connect Four from the Last Move associated with Snowflake?

FastPrep tags this as a Snowflake phone screen coding practice problem when the problem catalog has that company and stage context.

Connect Four from the Last Move

Snowflake● EasyFULLTIMEPHONE SCREEN

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Problem statement

A rectangular Connect Four board contains 0 for empty cells and 1 or 2 for player pieces. The piece at [row, col] is the move that was just placed by player.

Return whether that move belongs to a horizontal, vertical, or diagonal contiguous run of at least four player pieces. You only need to determine whether the supplied move completes a run; do not validate gravity or earlier game history.

Function

didPlayerConnectFour(board: int[][], row: int, col: int, player: int) → boolean

Examples

Example 1

board = [[0,0,0,0],[1,1,1,1],[0,0,0,0]]row = 1col = 3player = 1return = true

The supplied move completes a horizontal run of four.

Example 2

board = [[2,0,0,0],[0,2,0,0],[0,0,2,0],[0,0,0,2]]row = 2col = 2player = 2return = true

The move lies on a four-piece diagonal.

Example 3

board = [[1,1,1,0]]row = 0col = 2player = 1return = false

Three contiguous pieces are not enough.

Constraints

1 <= board.length, board[i].length <= 200.
All rows have equal length and every cell is 0, 1, or 2.
row and col identify a valid cell and player is 1 or 2.