#include <stdio.h>
#include <iostream>
#include <math.h>

using namespace std;

struct Polinomial
{
    int coefficient;
    int expX;
    int expY;
    int expZ;
    Polinomial *next;
};
typedef Polinomial* Point;

void Create(Point &List)
{
    Point P, Last = NULL;
    char ch;
    int counter = 0;

    cout << "Nov element (Y/N) ?:";
    cin >> ch;

    while (ch == 'Y' || ch == 'y')
    {
        counter++;
        P = new Polinomial;

        cout << "Element nomer " << counter << ":" << endl;
        cout << "Vuvedete koeficient na polinoma:";
        cin >> P->coefficient;
        cout << "Vuvedete stepen na x:";
        cin >> P->expX;
        cout << "Vuvedete stepen na y:";
        cin >> P->expY;
        cout << "Vuvedete stepen na z:";
        cin >> P->expZ;

        P->next = NULL;
        if (List == NULL)
            List = P;
        else
            Last->next = P;

        Last = P;
        cout << "Nov element ?:";
        cin >> ch;

    }
}
void PrintPolynomial(Point P)
{
    while (P)
    {
        char sign = ((P->coefficient >= 0) ? '+' : '-'); //Решава какъв знак да сложи преди коефициента (+ или -)
        cout << sign << abs(P->coefficient) << "*x^" << P->expX << "*y^" << P->expY << "*z^" << P->expZ;
        P = P->next;
    }
    cout << endl;
}

int CalculatePolynomial(Point List)
{
    int valueX, valueY, valueZ, total = 0, counter = 0;

    while (List)
    {
        counter++;

        cout << "Element nomer " << counter << ":" << endl;
        cout << "--Vuvedete stoinost na x: " << endl;
        cin >> valueX;
        cout << "--Vuvedete stoinost na y: " << endl;
        cin >> valueY;
        cout << "--Vuvedete stoinost na z: " << endl;
        cin >> valueZ;

        total += List->coefficient * pow(valueX, List->expX) * pow(valueY, List->expY) * pow(valueZ, List->expZ);
        List = List->next;
    }
    return total;
}

void main()
{
    Point List = NULL;
    Create(List);
    PrintPolynomial(List);
    int result = CalculatePolynomial(List);
    cout << "Sumata na polinoma e: " << result << endl;
}