Today I was try to solve this problem: https://mirror.codeforces.com/gym/100952/problem/J.↵
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My main idea is:↵
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- Find all point $X$s that $X$ is a node of $A$ and in $B$'s area.↵
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- Find all point $X$s that $X$ is a node of $B$ and in $A$'s area.↵
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- Find all intersection points of $A$ and $B$.↵
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Let call the set of points we found is $S$, $S$ will be a convex hull, find the area of $S$ — the answer of problem.↵
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But somehow I get WA verdict, can anyone help me to find out why, thanks all.↵
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(This is my code: https://ideone.com/8wXu6a.)
↵
My main idea is:↵
↵
- Find all point $X$s that $X$ is a node of $A$ and in $B$'s area.↵
↵
- Find all point $X$s that $X$ is a node of $B$ and in $A$'s area.↵
↵
- Find all intersection points of $A$ and $B$.↵
↵
Let call the set of points we found is $S$, $S$ will be a convex hull, find the area of $S$ — the answer of problem.↵
↵
But somehow I get WA verdict, can anyone help me to find out why, thanks all.↵
↵
(This is my code: https://ideone.com/8wXu6a
