4 kyu

Count ones in a segment

664 of 3,324d0n14

Description:

Given two numbers: 'left' and 'right' (1 <= 'left' <= 'right' <= 200000000000000) return sum of all '1' occurencies in binary representations of numbers between 'left' and 'right' (including both)

Example:
countOnes 4 7 should return 8, because:
4(dec) = 100(bin), which adds 1 to the result.
5(dec) = 101(bin), which adds 2 to the result.
6(dec) = 110(bin), which adds 2 to the result.
7(dec) = 111(bin), which adds 3 to the result.
So finally result equals 8.

WARNING: Segment may contain billion elements, to pass this kata, your solution cannot iterate through all numbers in the segment!

Binary
Performance
Algorithms

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Stats:

CreatedJul 17, 2017
PublishedJul 17, 2017
Warriors Trained17852
Total Skips5647
Total Code Submissions23537
Total Times Completed3324
C++ Completions664
Haskell Completions119
JavaScript Completions797
Python Completions1029
C Completions343
NASM Completions23
Java Completions228
Forth Completions12
C# Completions158
COBOL Completions10
Go Completions44
Rust Completions72
Kotlin Completions49
Total Stars752
% of votes with a positive feedback rating94% of 518
Total "Very Satisfied" Votes463
Total "Somewhat Satisfied" Votes45
Total "Not Satisfied" Votes10
Total Rank Assessments8
Average Assessed Rank
4 kyu
Highest Assessed Rank
4 kyu
Lowest Assessed Rank
6 kyu
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