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  1. #include <iostream>
  2. #include <set>
  3. #include <algorithm>
  4.  
  5. struct Vector3 {
  6. 	int x, y, z;
  7. };
  8. struct Area {
  9. 	Vector3 first;
  10. 	Vector3 second;
  11. 	inline bool inArea(Vector3 &vec) const
  12. 	{
  13. 		auto minX = std::min(first.x, second.x);
  14. 		auto maxX = std::max(first.x, second.x);
  15. 		auto minY = std::min(first.y, second.y);
  16. 		auto maxY = std::max(first.y, second.y);
  17. 		auto minZ = std::min(first.z, second.z);
  18. 		auto maxZ = std::max(first.z, second.z);
  19. 		auto &x = vec.x;
  20. 		auto &y = vec.y;
  21. 		auto &z = vec.z;
  22.  
  23. 		return x >= minX && x <= maxX && y >= minY && y <= maxY && z >= minZ && z <= maxZ;
  24. 	}
  25.  
  26. 	inline bool operator<(Area const& rhs) const
  27. 	{
  28. 		return std::max(first.x, second.x) < std::max(rhs.first.x, rhs.second.x);
  29. 	}
  30. };
  31.  
  32. int debugCnt = 0;
  33. std::set<Area> areas;
  34. // std::map<int, std::set<Area>::iterator> myMap;
  35. bool canPlaceBlock(Vector3 block)
  36. {
  37. 	for (auto it = areas.lower_bound({block, block}); it != areas.end() && std::min(it->first.x, it->second.x) <= block.x; ++it) {
  38. 		++debugCnt;
  39. 		if (it->inArea(block))
  40. 			return false;
  41. 	}
  42. 	return true;
  43. }
  44.  
  45. int main() {
  46. 	// test code
  47. 	for (int l = 0; l <= 10000; l++) {
  48. 		int r = l + 100;
  49. 		Vector3 first{l, l, l};
  50. 		Vector3 second{r, r, r};
  51. 		areas.insert({first, second});
  52. 	}
  53. 	std::cout << (canPlaceBlock({123, 456, 789}) ? "true" : "false") << '\n';
  54. 	std::cout << debugCnt << '\n';
  55. 	return 0;
  56. }
Success #stdin #stdout 0.01s 5452KB
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Standard input is empty
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https://ideone.com/6zX6LJ
language:
C++14 (gcc 8.3)
created:
3 years ago
visibility:
secret

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