How should I practice Intersection of Two Rectangles?

Start by reading the full statement, solve the visible examples, then compare the pattern against related Figma phone screen problems in FastPrep.

Is Intersection of Two Rectangles associated with Figma?

FastPrep tags this as a Figma phone screen coding practice problem when the problem catalog has that company and stage context.

Intersection of Two Rectangles

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Problem statement

Each axis-aligned rectangle is represented as [left, bottom, right, top], where left < right and bottom < top.

Return the positive-area intersection of first and second in the same format. If they do not overlap with positive area, return an empty array. Rectangles that only touch along an edge or at one point have no positive-area intersection.

Function

intersectRectangles(first: int[], second: int[]) → int[]

Examples

Example 1

first = [0,0,4,4]second = [2,1,6,3]return = [2,1,4,3]

The common horizontal interval is [2, 4], and the common vertical interval is [1, 3].

Example 2

first = [-3,-2,5,7]second = [0,0,2,2]return = [0,0,2,2]

The second rectangle lies completely inside the first.

Example 3

first = [0,0,2,2]second = [2,0,5,3]return = []

The rectangles touch at the vertical edge x = 2 but share no positive area.

Constraints

first.length == second.length == 4.
-10^9 <= left < right <= 10^9.
-10^9 <= bottom < top <= 10^9.