#include<iostream>
#include<cmath>

using namespace std;
class dathuc{
public:
    int bac;
    int *heso;

    dathuc(){
        cout<< "nhap bac da thuc: ";
        cin>> this->bac;
        heso = (int *) malloc(sizeof(int)* (this->bac + 1));
        for (int i=bac; i>=0; i--){
            cout<< "nhap he so bac "<<i << ": ";
            cin>> heso[i];
        }
        cout<< "da thuc vua nhap la: "<<"\n";
        for (int i=bac; i>=1; i--){
            cout<<heso[i]<<"X^"<<i << "+";
        }
        cout<<heso[0]<<" = 0"<< "\n";
    }

    ~dathuc(){
        free(heso);
    }

    int giatri(){
        int x;
        int giatri=0;
        cout<< "nhap X: ";
        cin>> x;
        for (int i=bac; i>=0; i--){
            giatri += heso[i]*pow(x,bac);
        }
        return giatri;
    }
};
int main(int argc, char const *argv[])
{
    dathuc dt;
    cout<< dt.giatri();
    return 0;
}