fork download
copy 
  1. #include <iostream>
  2. #include <cmath>
  3. using namespace std;
  4. typedef long long int ll ;
  5. ll mod = 1000000007;
  6. int main() {
  7. 	ll b ;
  8. 	ll a =  1;
  9. 	ll c ;
  10. 	ll d;
  11. 	ll n, k ;
  12. 	cin >> n >> k ; 
  13.  
  14.  
  15. 	b = -((2*(n%mod))%mod + 3);
  16. 	//cout << b ;
  17. 	c = -(k - n*n - n );
  18. 	b = b%mod;
  19. 	d = (b*b)%mod - (4*1*(c)%mod)%mod ;
  20.  
  21.     long double ans = (-b - sqrtl(d))/(2*1) ; 
  22.  
  23.  
  24.     if (ans < 0 )
  25.     {
  26.     	ans = (-b +  sqrtl(d))/(2*1) ; 
  27.     }
  28. 	cout << (ans) << endl ;
  29. 	return 0;
  30. }
  31.  
Success #stdin #stdout 0s 15232KB
comments (?)
stdin
copy 
9 26
stdout
copy 
3.69926
https://ideone.com/1gb53x
language:
C++14 (gcc 8.3)
created:
4 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!