P2937 [USACO09JAN] Laserphones S
Description
The cows have a new laser-based system so they can have casual conversations while out in the pasture which is modeled as a W x H grid of points (1
Input Format
\* Line 1: Two space separated integers: W and H
\* Lines 2..H+1: The entire pasture.
Output Format
\* Line 1: A single integer: M