1610. Maximum Number of Visible Points

class Solution {
    public int visiblePoints(List<List<Integer>> points, int angle, List<Integer> location) {
        List<Double> angles = new ArrayList<>();
        int sameLocationPoints = 0;
        
       
        for (List<Integer> point : points) {
            int dx = point.get(0) - location.get(0);
            int dy = point.get(1) - location.get(1);
            
            
            if (dx == 0 && dy == 0) {
                sameLocationPoints++;
                continue;
            }
            
            
            double angleInDegrees = Math.toDegrees(Math.atan2(dy, dx));
            angles.add(angleInDegrees);
        }
        
        
        Collections.sort(angles);
        
        
        int n = angles.size();
        for (int i = 0; i < n; i++) {
            angles.add(angles.get(i) + 360);
        }
        
        
        int maxPoints = 0;
        int left = 0;
        
        for (int right = 0; right < angles.size(); right++) {
            while (angles.get(right) - angles.get(left) > angle) {
                left++;
            }
            maxPoints = Math.max(maxPoints, right - left + 1);
        }
        
        
        return maxPoints + sameLocationPoints;
    }
}