Watchtower Overlap
You are building a patrol planning tool for a network of watchtowers on an 8×8 observation grid.

- CMakeLists.txt
- watchtower_overlap.cpp
- watchtower_overlap.h
The full README and the hidden test suite are available once you open the byte in your CodeSubmit workspace. Candidates never see the hidden tests.
Standard engineering judgment. Multiple edge cases worth handling.
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