jakaria_hossain

lightoj - 1331 - Agent J

Aug 23rd, 2019
125
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  1. #include<bits/stdc++.h>
  2. using namespace std;
  3. int main()
  4. {
  5. int test;
  6. cin>>test;
  7. for(int t=1;t<=test;t++)
  8. {
  9. double r1,r2,r3,a,b,c,s,A,B,C,area,result;
  10. cin>>r1>>r2>>r3;
  11. a=r1+r2;
  12. b=r2+r3;
  13. c=r3+r1;
  14. s=(a+b+c)/2;
  15. area=sqrt(s*(s-a)*(s-b)*(s-c));
  16. A=acos((a*a+c*c-b*b)/(2.0*a*c));
  17. B=acos((a*a+b*b-c*c)/(2.0*a*b));
  18. C=acos((b*b+c*c-a*a)/(2.0*b*c));
  19. result=area-A*r1*r1/2-B*r2*r2/2-C*r3*r3/2;
  20. cout<<"Case "<<t<<": "<<setprecision(9)<<fixed<<result<<endl;
  21. }
  22. }
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