fork download 
  1. #include <iostream>
  2. #include <vector>
  3.  
  4. std::vector<std::size_t> GanerateArray(std::size_t N){
  5.  
  6. 	std::vector<std::size_t> vec;
  7. 	std::size_t undefined;//不定値
  8.  
  9. 	vec.push_back(undefined);//不備？？昇順なので、0か1の可能性。
  10. 	vec.push_back(1);//絶対条件
  11. 	vec.push_back(2);//seed??
  12.  
  13. 	for (std::size_t i = 2; i < N; i++)
  14. 	{
  15. 		for (std::size_t j = 0; j < vec[i]; j++)
  16. 		{
  17. 			vec.push_back(i);
  18. 			if (vec.size() > N) return vec;
  19. 		}
  20. 	}
  21.  
  22. 	return vec;
  23. }
  24.  
  25. int main(){
  26. 	auto A = GanerateArray(1000);
  27.  
  28. 	std::cout << "N=10:" << A[10] << std::endl;
  29. 	std::cout << "N=100:" << A[100] << std::endl;
  30. 	std::cout << "N=1000:" << A[1000] << std::endl;
  31.  
  32. 	return 0;
  33. }
Success #stdin #stdout 0s 3472KB
comments (?)
stdin 
Standard input is empty
stdout 
N=10:5
N=100:21
N=1000:86
https://ideone.com/VctS8c
language:
C++14 (gcc 8.3)
created:
10 years ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!