How should I practice Longest Consecutive Same-Color Line?

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

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

Problem · Array

Longest Consecutive Same-Color Line

● Medium

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Problem statement

You are given a non-empty rectangular grid of uppercase color symbols. The grid is represented by grid, where grid[row][column] is the color at that cell.

A same-color line is a contiguous sequence of cells that all contain the same symbol. A line may extend in exactly one of these four orientations:

The problem statement continues

Pro

Examples

Example 1

grid = ["RRRG","RRBB","GRRR","BGBR"]return = 4

The cells from (0, 0) through (3, 3) form a down-right diagonal of four R symbols. No longer line exists.

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