How should I practice Count Matrix Paths Through Ordered Checkpoints?

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

Is Count Matrix Paths Through Ordered Checkpoints associated with Google?

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

Count Matrix Paths Through Ordered Checkpoints

Google● HardFULLTIMEPHONE SCREEN

Problem statement

Start at (rows-1,0) and finish at (rows-1,columns-1). Every move advances one column and changes the row by -1, 0, or +1 while remaining in bounds.

The problem statement continues

Pro

Examples

Example 1

rows = 3columns = 4checkpoints = [[1,1],[2,3]]return = 2

Two choices reach the first checkpoint and two more steps finish at the required endpoint.

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