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  1. #include <algorithm>
  2. #include <iostream>
  3.  
  4.  
  5. bool contains(const int (&m)[8][8], int value)
  6. {
  7.     return std::any_of(std::begin(m), std::end(m), [value](const auto&a)
  8.     {
  9.     	return std::any_of(std::begin(a), std::end(a), [value](int e)
  10.     	{
  11.     		return e == value;
  12.     	});
  13.     });
  14. }
  15.  
  16. bool contain_one_and_minus_one(const int (&m)[8][8])
  17. {
  18. 	return contains(m, 1) && contains(m, -1);
  19. }
  20.  
  21. int main() {
  22. 	int m[8][8] = {
  23. 	    {0, 0, 0, 0, 0, 0, 0, 0},
  24. 	    {0, 0, 0, 0, 0, 0, 0, 0},
  25. 	    {0, 0, 0, 0, 0, 0, 0, 0},
  26. 	    {0, 0, 0, 0, 0, 0, 0, 0},
  27. 	    {0, 0, 0, 0, 0, 0, 0, 0},
  28. 	    {0, 0, 0, 0, 0, 0, 0, 0},
  29. 	    {0, 0, 0, 0, 0, 0, 0, 0},
  30. 	    {0, 0, 0, 0, 0, 0, 0, 0}
  31. 	};
  32.     std::cout << contain_one_and_minus_one(m) << std::endl;
  33.     m[4][2] = 1;
  34.     std::cout << contain_one_and_minus_one(m) << std::endl;
  35.     m[2][4] = -1;
  36.     std::cout << contain_one_and_minus_one(m) << std::endl;
  37. }
  38.  
Success #stdin #stdout 0s 3096KB
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https://ideone.com/SvBcFI
language:
C++14 (gcc 8.3)
created:
10 years ago
visibility:
public

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