Given an array points where points[i] = [xi, yi] represents a point on the X-Y plane, return true if these points are a boomerang.
A boomerang is a set of three points that are all distinct and not in a straight line.
Example 1:
Input: points = [[1,1],[2,3],[3,2]]
Output: true
Example 2:
Input: points = [[1,1],[2,2],[3,3]]
Output: false
Solution
class Solution:
def isBoomerang(self, points: List[List[int]]) -> bool:
x1, x2, x3 = points[0][0], points[1][0], points[2][0]
y1, y2, y3 = points[0][1], points[1][1], points[2][1]
a = (x1 * (y2 - y3) +
x2 * (y3 - y1) +
x3 * (y1 - y2))
return False if a == 0 else True