# -*- coding: utf-8 -*-
"""
Created on Sat Nov 28 21:42:32 2020

@author: ANIRUDH
"""


"""
Students are asked to stand in non-decreasing order of heights for an annual photo.

Return the minimum number of students that must move in order for all students to be standing
in non-decreasing order of height.

Notice that when a group of students is selected they can reorder in any possible way between 
themselves and the non selected students remain on their seats.


Example 1:

Input: heights = [1,1,4,2,1,3]
Output: 3
Explanation: 
Current array : [1,1,4,2,1,3]
Target array  : [1,1,1,2,3,4]
On index 2 (0-based) we have 4 vs 1 so we have to move this student.
On index 4 (0-based) we have 1 vs 3 so we have to move this student.
On index 5 (0-based) we have 3 vs 4 so we have to move this student.
Example 2:

Input: heights = [5,1,2,3,4]
Output: 5
Example 3:

Input: heights = [1,2,3,4,5]
Output: 0

"""

def heightChecker(heights):
        """
        :type heights: List[int]
        :rtype: int
        """
        cnt=0
        height=sorted(heights)
        for i,j in zip(height,heights):
            if i!=j:
                cnt+=1
        return cnt
heights = [1,1,4,2,1,3]
print(heightChecker(heights))