请求假期数据，现在的数组枚举都能过

#include<bits/stdc++.h>
using namespace std;
int main(){
    int un=0;
    double a,b,c,d;
    cin>>a>>b>>c>>d;
    for(double i=-100.0;i<=100;i+=0.001){
        if(fabs(a*i*i*i+b*i*i+c*i+d)<=0.00001){
            cout<<fixed<<setprecision(2)<<i<<" ";
            un++;
        }
        if(un==3){
            break;
        }
    }
}