1001 Can you solve this equation?

[align=left]Problem Description[/align]
Now,given the equation 8*x^4 + 7*x^3 + 2*x^2 + 3*x + 6 == Y,can you find its solution between 0 and 100;<br>Now please try your lucky.
 

[align=left]Input[/align]
The first line of the input contains an integer T(1<=T<=100) which means the number of test cases. Then T lines follow, each line has a real number Y (fabs(Y) <= 1e10);
 

[align=left]Output[/align]
For each test case, you should just output one real number(accurate up to 4 decimal places),which is the solution of the equation,or “No solution!”,if there is no solution for the equation between 0 and 100.
 

[align=left]Sample Input[/align]

2<br>100<br>-4<br>

 

[align=left]Sample Output[/align]

1.6152<br>No solution!<br>

 

#include
#include
#include
using namespacestd;

double v(doublex)
{
   return (8*pow(x,4) 7*pow(x,3) 2*pow(x,2) 3*x6);
}
double f(doublex,double z, double y)
{
 doublemid;
   while((y-z)>1e-10)
   {
       mid=(zy)/2;
      if(v(mid)
          z=mid 1e-10;
      else
          y=mid-1e-10;
   }
   return mid;

}
intmain()
{
   int n;
   double a;
  cin>>n;
   while(n--)
   {
      cin>>a;
      if(a<6||a>807020306||fabs(f(a,0,100))<1e-4)
      cout<<"Nosolution!"<<endl;
      else
      cout<<fixed<<setprecision(4)<<f(a,0,100)<<endl;
   }
return0;
}