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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. int main() {
  5. 	int n,k=0,S=1;
  6. cin>>n;
  7. for(int i=2;i<=n;++i)
  8. {
  9.     S+=i;
  10.     if(S>=n) ++k;
  11.     else break;
  12. }
  13. cout<<k;
  14. 	return 0;
  15. }
Success #stdin #stdout 0s 15232KB
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https://ideone.com/ecB32f
language:
C++ (gcc 8.3)
created:
4 years ago
visibility:
public

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