How should I practice Robo Data Sharing Direction?

Start by reading the full statement, solve the visible examples, then compare the pattern against related Arcesium online assessment problems in FastPrep.

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Problem · Matrix

Robo Data Sharing Direction

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Problem statement

Robots occupy every cell of a rows by cols matrix. Data starts at one corner, (startRow, startCol), using 1-based coordinates.

After a robot consumes the data, it passes the data to the first adjacent robot that has not consumed it, using this priority:

Right: (row, col + 1).
Left: (row, col - 1).
Front: (row - 1, col).
Back: (row + 1, col).

For the queried robot (row, col), return the direction in which it passes the data. Return Over if it is the final robot to consume the data.

Function

nextDataDirection(rows: int, cols: int, startRow: int, startCol: int, row: int, col: int) → String

Examples

Example 1

rows = 3cols = 3startRow = 1startCol = 1row = 3col = 3return = "Over"

Starting at the top-left corner produces a row-by-row snake traversal. Cell (3, 3) is last.

Example 2

rows = 2cols = 3startRow = 1startCol = 3row = 2col = 2return = "Right"

The first row is traversed right-to-left. After moving down, the second row is traversed left-to-right, so (2, 2) passes data right.

Constraints

rows and cols are positive.
(startRow, startCol) is one of the four corners.
1 <= row <= rows and 1 <= col <= cols.