1 #include <stdio.h>
 2 #include <string.h>
 3 #include <stdlib.h>
 4 #include <iostream>
 5 #include <algorithm>
 6 #include <math.h>
 7 #define eps 1e-8
 8 using namespace std;
 9 
10 double fx(double x)
11 {
12     return 8*pow(x,4)+7*pow(x,3)+2*x*x+3*x+6;
13 }
14 
15 int main()
16 {
17     int n,m,i,j;
18     double y;
19     double left=0,right=100,ans;
20     scanf("%d",&n);
21     while(n--)
22     {
23         scanf("%lf",&y);
24         left=0.0,right=100.0;
25         //ans=-100000;
26         bool flag=true;
27         while(right-left>eps)
28         {
29             double mid=(left+right)/2.0;
30             if(fx(mid)-y< 0)
31                  left=mid+eps;
32             else right=mid-eps;
33             //if()flag=false;
34         }
35         if(y>fx(100) || y<fx(0))
36             printf("No solution!\n");
37         else
38             printf("%.4lf\n",left);
39     }
40 
41 }