How should I practice Count Communicating Servers?

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

Is Count Communicating Servers associated with Fox Corporation?

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

Count Communicating Servers

Fox Corporation● MediumFULLTIMEPHONE SCREEN

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Problem statement

A binary matrix represents servers: grid[r][c] = 1 means a server is present. Two servers can communicate when they share a row or column.

Return the number of servers that can communicate with at least one other server.

Function

countCommunicatingServers(grid: int[][]) → int

Examples

Example 1

grid = [[1,0],[0,1]]return = 0

Neither server shares a row or column.

Example 2

grid = [[1,0],[1,1]]return = 3

All three servers communicate.

Example 3

grid = [[1,1,0,0],[0,0,1,0],[0,0,1,0]]return = 4

Every server belongs to a shared row or column.

Constraints

0 <= rows, columns <= 1000.
Every cell is 0 or 1.