OJ Board

Hi,

I can't seem to figure this one out. I implemented it in two different ways and got WA each time. Am I missing any tricky cases, or is my algorithm just wrong?

1. Find area of poly 1 (A1)
2. Find area of poly 2 (A2)

3. Take the convex hull of:
a) points of poly 1 that are in poly 2
b) points ...