Height Checker
Let’s understand the problem first: We need to arrange students in nondecreasing order of their heights, and then compare the current order of heights with the expected order. The task is to count how many heights are out of place.


Explanation
 We sort the given
heights
array to create the expected order of heights.  We then initialize a variable
mismatch_count
to keep track of the number of heights that are out of place.  We iterate through the
heights
array and compare each height with the corresponding height in the sortedexpected
array. If they don’t match, we increment themismatch_count
.  Finally, we return the total number of mismatched heights, which gives the number of indices where
heights[i]
is not equal toexpected[i]
.