Implement function CountNumbers that accepts a sorted array of unique integers and, efficiently with respect to time used, counts the number of array elements that are less than the parameter lessThan.

For example, SortedSearch.CountNumbers(new int[] { 1, 3, 5, 7 }, 4) should return 2 because there are two array elements less than 4.

C# 7.0, .NET Framework 4.7 
 

  •   Example case: System.NotImplementedException at SortedSearch.CountNumbers(Int32[] sortedArray, Int32 lessThan) in SortedSearch.cs:line 7
  •   Various small arrays: System.NotImplementedException at SortedSearch.CountNumbers(Int32[] sortedArray, Int32 lessThan) in SortedSearch.cs:line 7
  •   Performance test when sortedArray contains lessThan: System.NotImplementedException at SortedSearch.CountNumbers(Int32[] sortedArray, Int32 lessThan) in SortedSearch.cs:line 7
  •   Performance test when sortedArray doesn't contain lessThan: System.NotImplementedException at SortedSearch.CountNumbers(Int32[] sortedArray, Int32 lessThan) in SortedSearch.cs:line 7

Tags
C# Algorithmic thinking Searching Public
Hard

20min

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