Can you solve this equation?

Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others)

Total Submission(s): 12908 Accepted Submission(s): 5774



[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;

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
100
-4

[align=left]Sample Output[/align]

1.6152
No solution!

#include<stdio.h>
double m;
double f(double x)
{
return 8*x*x*x*x+7*x*x*x+2*x*x+3*x+6;
}
int main()
{
int n;
scanf("%d",&n);
while(n--)
{

double l,r,s,h;
scanf("%lf",&m);
if(f(0)<=m&&f(100)>=m)
{
l=0,r=100;
while(r-l>1e-7)
{
h=(r+l)/2;
s=f(h);
if(s>m)
r=h;
else
l=h;
}
printf("%.4lf\n",(r+l)/2);
}
else printf("No solution!\n");
}
return 0;
}