/*  * hdu2199.c  *  *  Created on: 2011-10-9  *      Author: bjfuwangzhu */ #include
     
       #include
      
        #define eps 1.0e-10 double f(double x) {
   return 8.0 * pow(x, 4.0) + 7.0 * pow(x, 3.0) + 2.0 * pow(x, 2.0) + 3 * x + 6; } void solve(double y) {
   double left, right, mid;     left = 0.0, right = 100.0; if (f(left) > y || f(right) < y) {
           puts("No solution!");     } else {
   while (fabs(left - right) > eps) {
               mid = (left + right) / 2; if (f(mid) > y) {
                   right = mid;             } else {
                   left = mid;             }         }         printf("%.4lf\n", mid);     } } int main() {
   #ifndef ONLINE_JUDGE     freopen("data.in", "r", stdin); #endif int t; double y;     scanf("%d", &t); while (t--) {
           scanf("%lf", &y);         solve(y);     } return 0; }