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How to find the number of concave corners of a polygon?
Good day, Codeforces!
Given a polygon with N vertices, where the vertices(x[i], y[i]) are listed in counterclockwise order, you need to determine the number of concave angles in the polygon. To better understand what is meant, refer to the provided illustrations:
| Rev. | Lang. | By | When | Δ | Comment | |
|---|---|---|---|---|---|---|
| en2 |
|
yuaksoinocenow | 2024-08-29 20:05:08 | 370 | (published) | |
| en1 |
|
yuaksoinocenow | 2024-08-29 19:56:21 | 325 | Initial revision (saved to drafts) |
