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  1. #include <iostream>
  2. #include <iomanip>
  3. #include <vector>
  4.  
  5. struct Range {
  6.   int start;
  7.   int end;
  8. };
  9.  
  10. const bool bools[] = {true, false, false, false, true, true, false};
  11. const int n = 7;
  12.  
  13. bool get_bool() {
  14. 	static int index = 0;
  15. 	return bools[index++];
  16. }
  17.  
  18. int main() {
  19. 	std::vector<Range> result;
  20. 	if (n > 0) {
  21. 		result.reserve(n);
  22. 		Range range{0,0};
  23.  
  24. 		using vec = std::vector<Range>;
  25. 		using func = void(*)(vec&, Range&, int);
  26. 		func actions[2] = {
  27. 			+[](vec&, Range &r, int) {},
  28. 			+[](vec &v, Range &r, int curr) {
  29. 				r.end = curr - 1;
  30. 				v.push_back(r);
  31. 				r.start = curr;
  32. 			}
  33. 		};
  34.  
  35. 		bool curr = get_bool(); // get 1st value
  36. 		for (int i = 1; i < n; ++i) {
  37. 		    bool val = get_bool(); // get next value
  38. 			actions[val != curr](result, range, i);
  39. 			curr = val;
  40. 		}
  41. 		range.end = n - 1;
  42. 		result.push_back(range);
  43. 	}
  44.  
  45.     std::cout << std::boolalpha;
  46.     std::cout << '{' << bools[0];
  47.     for(int i = 1; i < n; ++i) {
  48. 		std::cout << ',' << bools[i];
  49. 	}
  50.     std::cout << "}\n";
  51.  
  52. 	for(const auto &range : result) {
  53. 		std::cout << range.start << '-' << range.end << '\n';
  54. 	}
  55.  
  56. 	return 0;
  57. }
Success #stdin #stdout 0.01s 5476KB
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stdin
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Standard input is empty
stdout
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{true,false,false,false,true,true,false}
0-0
1-3
4-5
6-6
https://ideone.com/WHbGcf
language:
C++ (gcc 8.3)
created:
2 years ago
visibility:
secret

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