[Leetcode] 1051. Height Checker

https://leetcode.com/problems/height-checker/

class Solution:
    def heightChecker(self, heights: List[int]) -> int:
        expected = heights.copy()
        expected.sort()

        count = 0
        for i in range(len(heights)):
            if heights[i] != expected[i]:
                count += 1

        return count