Count L-Shaped Plots

Problem Overview

• Count all L-shaped arrangements of three flower plots in a 2D grid where each involved cell is 1.
• Input: row, col, magicNumber, mod; grid values come from a modulus formula. Output: number of L shapes.
• An L uses one cell sharing a row with one and a column with another; cells need not be adjacent.
• Context: garden layout analysis on a generated grid.
• From Uber interviews; a classic coding interview problem and interview question.