Medium
Quiz
#593 Valid Square
APPROACH
Given four 2D points p1, p2, p3, and p4 each as [x, y] (in no particular order), return true if they form a valid square — four equal-length positive sides meeting at right angles — or false otherwise.
Example 1:
Input: p1 = [0,0], p2 = [1,1], p3 = [1,0], p4 = [0,1]
Output: true
Example 2:
Input: p1 = [0,0], p2 = [1,1], p3 = [1,0], p4 = [0,12]
Output: false
Example 3:
Input: p1 = [1,0], p2 = [-1,0], p3 = [0,1], p4 = [0,-1]
Output: true
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What is the optimal approach for this problem?