救救我，458WA

#include<bits/stdc++.h>
using namespace std;
int main(){
    double  a,b,c,d,x1,x2;
    cin>>a>>b>>c;
    d=b*b-4*c*a;
    x1=(-b+sqrt(d))/(2*a);
    x2=(-b-sqrt(d))/(2*a);
    if (x1==x2){
        cout<<"x1="<<"x2="<<fixed<<setprecision(5)<<x2;
    }else if(d<0){
        cout<<"No answer!";
    }else{
        cout<<"x1="<<fixed<<setprecision(5)<<x1<<";x2="<<fixed<<setprecision(5)<<x2;
    }
}