[Leetcode] Convex Polygon Convex polygon

Given a list of points so form a polygon when joined sequentially, find if the polygon is convex (convex polygon Defini tion).

Note:

1. There is at the least 3 and at the most points.
2. Coordinates is in the range-10,000 to 10,000.
3. Assume the polygon formed by given points are always a simple polygon (simple polygon definition). In the other words, we ensure that exactly the edges intersect at all vertex, and that edges otherwise don ' t intersect ea ChOther.

Example 1:

[[0,0],[0,1],[1,1],[1,0]] Answer:trueexplanation:

Example 2:

[[0,0],[0,10],[10,10],[10,0],[5,5]] Answer:falseexplanation:

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[Leetcode] Convex Polygon Convex polygon