fork download 
  1. #include <iostream>
  2. using namespace std;
  3.  
  4. unsigned count(unsigned n) {
  5.   n = (n & 0x55555555) + ((n >>  1) & 0x55555555);
  6.   n = (n & 0x33333333) + ((n >>  2) & 0x33333333);
  7.   n = (n & 0x0F0F0F0F) + ((n >>  4) & 0x0F0F0F0F);
  8.   n = (n & 0x00FF00FF) + ((n >>  8) & 0x00FF00FF);
  9.   return (n & 0x0000FFFF) + ((n >> 16) & 0x0000FFFF);
  10. }
  11.  
  12. int main() {
  13. 	std::cout << count(65535);
  14. 	return 0;
  15. }
Success #stdin #stdout 0s 4548KB
comments (?)
stdin 
Standard input is empty
stdout 
16
https://ideone.com/Bybfmg
language:
C++14 (gcc 8.3)
created:
8 years ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!