Remove Covered Intervals Python Solution

lcpy gen -n 1288   # by problem number
lcpy gen -s remove_covered_intervals   # by problem name

Input: intervals = [[1,4],[3,6],[2,8]]
Output: 2
Explanation: Interval [3,6] is covered by [2,8], therefore it is removed.

Input: intervals = [[1,4],[2,3]]
Output: 1

class Solution:
    def remove_covered_intervals(self, intervals: list[list[int]]) -> int:
        intervals.sort(key=lambda interval: (interval[0], -interval[1]))
        count = 0
        best_end = -1
        for _, right in intervals:
            if right > best_end:
                count += 1
                best_end = right
        return count