hdu 2199:Can you solve this equation?(二分搜索)
Can you solve this equation?
Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others)
Total Submission(s): 7493 Accepted Submission(s): 3484
Now please try your lucky.
#include <iostream>
#include <cmath>
#include <iomanip>
using namespace std; double cal(double x)
{
return *pow(x,) + *pow(x,) + *pow(x,) + *x + ;
}
double GetAns(double y)
{
double a=,b=;
while(b-a>1e-){
double mid=(a+b)/;
cal(mid)<y?a=mid:b=mid;
}
return (a+b)/;
}
int main()
{
int T;
cin>>T;
while(T--){
double y;
cin>>y;
if(cal()<=y && y<=cal()){
cout<<setiosflags(ios::fixed)<<setprecision();
cout<<GetAns(y)<<endl;
}
else
cout<<"No solution!"<<endl;
}
return ;
}
Freecode : www.cnblogs.com/yym2013
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