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  1. #include <iostream>
  2. #include <vector>
  3. #include <algorithm>
  4.  
  5.  
  6. std::vector<std::size_t> basket = {10, 12, 81, 2, 7, 33, 99, 21, 11, 121, 10};
  7.  
  8. int main() 
  9. {
  10. 	std::size_t count = 0;
  11. 	for (std::size_t i = 0; i < basket.size() - 4; ++i)
  12. 	{
  13. 		const std::size_t lower_a = (basket[i] % 10);
  14. 		if (lower_a % 2 == 0 || lower_a % 5 == 0)
  15. 		{
  16. 			continue;
  17. 		}
  18.  
  19. 		for (std::size_t j = i + 4; j < basket.size(); ++j)
  20. 		{
  21. 			const std::size_t lower_b = basket[j] % 10;
  22. 			if ((lower_a * lower_b) % 10 == 1)
  23. 			{
  24. 				count++;
  25. 			}
  26. 		}
  27. 	}
  28.  
  29. 	std::cout<<"count = "<<count;
  30. 	return 0;
  31. }
Success #stdin #stdout 0s 15232KB
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Standard input is empty
stdout
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count = 3
https://ideone.com/1jqjIH
language:
C++14 (gcc 8.3)
created:
4 years ago
visibility:
public

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