Height Checker
A school is trying to take an annual photo of all the students. The students are asked to stand in a single file line in non-decreasing order by height. Let this ordering be represented by the integer array expected where expected[i] is the expected height of the i^th student in line.
You are given an integer array heights representing the current order that the students are standing in. Each heights[i] is the height of the i^th student in line (0-indexed).
Return the number of indices where heights[i] != expected[i].
Example 1
#
# #
# # #
# # # # # #
1 1 4 2 1 3Input
heights = [1,1,4,2,1,3]Output
3After sorting, indices 2, 4, and 5 do not match the expected order.
Example 2
# # # # # # # # # # # # # # # 5 1 2 3 4
Input
heights = [5,1,2,3,4]Output
5After sorting, every index differs from the expected order.
Constraints
- 1 <= heights.length <= 100
- 1 <= heights[i] <= 100