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  1. #include <iostream>
  2. 	#include <sstream>
  3.  
  4. 	int multiply(int a, int b)
  5. 	{
  6. 		int result = 0;
  7. 		int shift = 0;
  8. 		while(b)
  9. 		{
  10. 			result ^= (a * (b & 1)) << shift;
  11. 			b >>= 1;
  12. 			shift++;
  13. 		}
  14. 		return result;
  15. 	}
  16.  
  17. 	int main()
  18. 	{
  19. 		std::string line;
  20. 		while(getline(std::cin, line))
  21. 		{
  22. 			std::stringstream ss(line);
  23. 			int a, b;
  24. 			ss >> a >> b;
  25. 			std::cout << a << '@' << b << " = " << multiply(a, b) << std::endl;
  26. 		}
  27. 	}
Success #stdin #stdout 0s 15240KB
comments ()
stdin
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5 9
1 2
9 0
6 1
3 3
2 5
7 9
13 11
5 17
14 13
19 1
63 63
stdout
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5@9 = 45
1@2 = 2
9@0 = 0
6@1 = 6
3@3 = 5
2@5 = 10
7@9 = 63
13@11 = 127
5@17 = 85
14@13 = 70
19@1 = 19
63@63 = 1365
https://ideone.com/lIqX6S
language:
C++14 (gcc 8.3)
created:
7 years ago
visibility:
public

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