Leetcode Problem 1453. Maximum Number of Darts Inside of a Circular Dartboard

1453. Maximum Number of Darts Inside of a Circular Dartboard

Leetcode Solutions

Angular Sweep with Circle of Radiusr

  1. Initialize the maximum number of darts inside the dartboard to 1 (since at least one dart will always be on the board).
  2. For each dart P in the list of darts: a. Initialize an empty list to store entry and exit angles of other darts relative to a circle centered at P with radius 2r. b. For each other dart Q: i. Calculate the distance d between P and Q. ii. If d is less than or equal to 2r, calculate the entry and exit angles for Q. iii. Add these angles to the list, marking entry angles with +1 and exit angles with -1. c. Sort the list of angles. d. Initialize a counter to 1 (for the dart P itself). e. Sweep through the sorted angles, adding or subtracting from the counter based on entry or exit. f. Update the maximum number of darts if the current counter is greater.
  3. Return the maximum number of darts found.
UML Thumbnail

Brute Force with Circumcenter of Three Points

Ask Question

Programming Language
image/screenshot of info(optional)
Full Screen
Loading...

Suggested Answer

Answer
Full Screen
Copy Answer Code
Loading...