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Grokking the Coding Interview Patterns in C++

Solution: Maximum Number of Visible Points

Explore how to find the maximum number of visible points from a fixed location within a specified viewing angle. Understand how to calculate angles for each point, sort them, and apply the two pointers method to identify the largest subset visible in the observer's field of view. This lesson helps you implement an efficient solution with clear geometric reasoning and optimal time complexity.

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Statement

You are provided with an array, points, an integer angle, and your location, where points[i] = [xi, yi] and location = [posx, posy], both representing integer coordinatesInteger coordinates refer to points on a plane where x and y values are whole numbers. on the X-Y plane.

You initially face directly east from your fixed location and cannot move. In other words, posx and posy cannot be changed. However, you can rotate to adjust your viewing direction. Your field of view, measured in degrees, is specified by the angle, representing the width of visibility. If you rotate counterclockwise by an angle dd, your visible field spans the inclusive range of angles [d−angle2,d+angle2][d-\frac{angle}{2}, d+\frac{angle}{2}] ...