Can you solve this equation
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): 5774Problem Description
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.
Now please try your lucky.
Input
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);
Output
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.
Sample Input
2 100 -4
Sample Output
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; }
版权声明：本文为博主原创文章，未经博主允许不得转载。