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  1. #include <iostream>
  2. #include <cmath>
  3.  
  4. using namespace std;
  5.  
  6. void func(int dest)
  7. {
  8. 	int n = sqrt(dest);
  9. 	int val;
  10. 	while(1){
  11. 		val=n*(n+1)/2;
  12. 		if(val>=dest && (val-dest)%2==0 &&((val-dest)>=n/2 || (val-dest)==0)){cout<<n; break;}
  13. 		n++;
  14. 	}
  15. }
  16.  
  17. int main() 
  18. {
  19. 	int dest;
  20. 	cin>>dest;
  21. 	func(abs(dest));
  22. 	return 0;
  23. }
Success #stdin #stdout 0s 3144KB
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https://ideone.com/4ZHdfx
language:
C++ (gcc 8.3)
created:
9 years ago
visibility:
public

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