Hello Every body i'm trying solve this problem ADASEA — Ada and Island i tried to understand what it want but i can't.

their is some meanings that i can't understand : -- considering equal probability for all coordinates -- so she has asked you to tell her the expected size of island .

All I want is to know what each word mean and if some one could explain the last two test Cases . I Would be Grateful .

Last thing i Want to do is to thank Errichto for his Video Algorithms Lecture #1 — Sums and Expected Value.