#include <bits/stdc++.h>
using namespace std;
pair<double,double> horner(vector<double>a,double x){
    double p=a[0],dp=0;
    for(int i=1;i<a.size();i++){dp=dp*x+p; p=p*x+a[i];}
    return {p,dp};
}
int main(){
    int n;cin>>n;vector<double>a(n+1);
    for(int i=0;i<=n;i++)cin>>a[i];
    double x0;cin>>x0;double E=1e-8;
    cout<<"Iter\t x\t\t f(x)\t\t f'(x)\t\t error\n";
    for(int i=1;i<=100;i++){
        auto [fx,dfx]=horner(a,x0);
        double x1=x0-fx/dfx;
        cout<<i<<"\t"<<x0<<"\t"<<fx<<"\t"<<dfx<<"\t"<<fabs(x1-x0)<<"\n";
        if(fabs((x1-x0)/x1)<E){cout<<"Root="<<x1;break;}
        x0=x1;
    }
}

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MgotMQ==

2
-1