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  1. #include <iostream>
  2.  
  3. std::size_t A(std::size_t N){
  4.  
  5. 	std::size_t C = 0;
  6.  
  7. 	for (std::size_t i = 0; i < N; i++)
  8. 	{
  9. 		C += i;
  10. 		if (C >= N) return i;
  11. 	}
  12.  
  13. 	return C;
  14. }
  15.  
  16. int main(){
  17. 	std::cout << "N=10:" << A(10) << std::endl;
  18. 	std::cout << "N=100:" << A(100) << std::endl;
  19. 	std::cout << "N=1000:" << A(1000) << std::endl;
  20.  
  21. 	return 0;
  22. }
Success #stdin #stdout 0s 3296KB
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stdin
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Standard input is empty
stdout
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N=10:4
N=100:14
N=1000:45
https://ideone.com/tSydPu
language:
C++14 (gcc 8.3)
created:
10 years ago
visibility:
public

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