У меня есть программа на java, но она работает не корректно ибо при вводных данных p = 3, n =3, коэффициентах 1 0 2 2 и y = 4 оно говорит что нет корней однако они есть исправь это 
package FiniteFieldRootsFinder;

import java.util.ArrayList;
import java.util.List;
import java.util.Objects;
import java.util.Scanner;

public class FiniteFieldRootsFinder {

    static class Polynomial {
        private final int[] coefficients;

        public Polynomial(int[] coefficients) {
            int m = coefficients.length - 1;
            while (m > 0 && coefficients[m] == 0) {
                m--;
            }
            this.coefficients = new int[m + 1];
            System.arraycopy(coefficients, 0, this.coefficients, 0, m + 1);
        }

        public int degree() {
            return coefficients.length - 1;
        }

        public int getCoefficient(int k) {
            if (k < 0 || k >= coefficients.length) {
                return 0;
            }
            return coefficients[k];
        }

        public Polynomial[] divide(Polynomial divisor, int p) {
            int[] dividend = this.coefficients.clone();
            int[] divisorCoeffs = divisor.coefficients;
            int divisorDegree = divisor.degree();
            int[] quotient = new int[Math.max(0, this.degree() - divisor.degree() + 1)];

            while (dividend.length - 1 >= divisorDegree && !isZero(dividend)) {
                int leadCoeffDividend = dividend[dividend.length - 1];
                int leadCoeffDivisor = divisorCoeffs[divisorDegree];
                if (leadCoeffDivisor == 0) {
                    break;
                }
                int factor = multiplyInverse(leadCoeffDivisor, p);
                if (factor == -1) {
                    break;
                }
                factor = (leadCoeffDividend * factor) % p;
                quotient[quotient.length - (dividend.length - divisorDegree)] = factor;

                for (int i = 0; i <= divisorDegree; i++) {
                    int index = dividend.length - 1 - i;
                    dividend[index] = (dividend[index] - factor * divisorCoeffs[divisorDegree - i]) % p;
                    if (dividend[index] < 0) {
                        dividend[index] += p;
                    }
                }

                while (dividend.length > 0 && dividend[dividend.length - 1] == 0) {
                    dividend = java.util.Arrays.copyOf(dividend, dividend.length - 1);
                }
                if (dividend.length == 0) {
                    dividend = new int[]{0};
                }
            }

            Polynomial quotientPoly = new Polynomial(quotient);
            Polynomial remainderPoly = new Polynomial(dividend);
            return new Polynomial[]{quotientPoly, remainderPoly};
        }

        private boolean isZero(int[] coeffs) {
            for (int c : coeffs) {
                if (c != 0) return false;
            }
            return true;
        }

        public boolean divides(Polynomial divisor, int p) {
            Polynomial[] result = this.divide(divisor, p);
            return result[1].isZero();
        }

        public boolean isZero() {
            for (int c : coefficients) {
                if (c != 0) return false;
            }
            return true;
        }

        private int multiplyInverse(int a, int p) {
            a = a % p;
            for (int i = 1; i < p; i++) {
                if ((a * i) % p == 1) {
                    return i;
                }
            }
            return -1;
        }

        public boolean isIrreducible(int p) {
            if (this.degree() < 1) return false;
            if (this.degree() == 1) return true;

            int halfDegree = this.degree() / 2;
            for (int d = 1; d <= halfDegree; d++) {
                List<Polynomial> irreducibleDivisors = generateIrreduciblePolynomials(d, p);
                for (Polynomial divisor : irreducibleDivisors) {
                    if (this.divides(divisor, p)) {
                        return false;
                    }
                }
            }
            return true;
        }

        private List<Polynomial> generateIrreduciblePolynomials(int deg, int p) {
            List<Polynomial> irreducibles = new ArrayList<>();
            generateIrreduciblePolynomialsHelper(new int[deg + 1], deg, p, irreducibles, 0);
            return irreducibles;
        }

        private void generateIrreduciblePolynomialsHelper(int[] coeffs, int deg, int p, List<Polynomial> irreducibles, int index) {
            if (index > deg) {
                Polynomial poly = new Polynomial(coeffs);
                if (poly.isIrreducible(p)) {
                    irreducibles.add(poly);
                }
                return;
            }

            for (int i = 0; i < p; i++) {
                coeffs[index] = i;
                generateIrreduciblePolynomialsHelper(coeffs, deg, p, irreducibles, index + 1);
            }
        }

        @Override
        public String toString() {
            StringBuilder sb = new StringBuilder();
            for (int i = coefficients.length - 1; i >= 0; i--) {
                if (coefficients[i] != 0) {
                    if (sb.length() > 0) {
                        sb.append(" + ");
                    }
                    if (i == 0) {
                        sb.append(coefficients[i]);
                    } else if (i == 1) {
                        if (coefficients[i] != 1) sb.append(coefficients[i]);
                        sb.append("z");
                    } else {
                        if (coefficients[i] != 1) sb.append(coefficients[i]);
                        sb.append("z^").append(i);
                    }
                }
            }
            if (sb.length() == 0) {
                return "0";
            }
            return sb.toString();
        }
    }

    static class FieldElement {
        private final int[] coefficients;
        private static int p;
        private static int n;
        private static Polynomial irreduciblePoly;

        public static void initialize(int prime, int degree, Polynomial irreduciblePoly) {
            p = prime;
            n = degree;
            FieldElement.irreduciblePoly = irreduciblePoly;
        }

        public FieldElement(int[] coefficients) {
            this.coefficients = new int[n];
            for (int i = 0; i < n; i++) {
                if (i < coefficients.length) {
                    this.coefficients[i] = mod(coefficients[i]);
                } else {
                    this.coefficients[i] = 0;
                }
            }
        }

        private int mod(int a) {
            int res = a % p;
            if (res < 0) res += p;
            return res;
        }

        public FieldElement add(FieldElement other) {
            int[] result = new int[n];
            for (int i = 0; i < n; i++) {
                result[i] = mod(this.coefficients[i] + other.coefficients[i]);
            }
            return new FieldElement(result);
        }

        public FieldElement multiply(FieldElement other) {
            int[] temp = new int[2 * n - 1];
            for (int i = 0; i < n; i++) {
                for (int j = 0; j < n; j++) {
                    temp[i + j] = (temp[i + j] + this.coefficients[i] * other.coefficients[j]) % p;
                }
            }

            for (int i = temp.length - 1; i >= n; i--) {
                if (temp[i] != 0) {
                    int factor = temp[i];
                    for (int j = 0; j < irreduciblePoly.coefficients.length; j++) {
                        temp[i - n + j] = (temp[i - n + j] - factor * irreduciblePoly.getCoefficient(j)) % p;
                        if (temp[i - n + j] < 0) temp[i - n + j] += p;
                    }
                    temp[i] = 0;
                }
            }

            int[] result = new int[n];
            for (int i = 0; i < n; i++) {
                result[i] = temp[i] % p;
                if (result[i] < 0) result[i] += p;
            }

            return new FieldElement(result);
        }

        public FieldElement pow(int exponent) {
            FieldElement result = FiniteFieldRootsFinder.getOne();
            FieldElement base = this;
            int exp = exponent;
            while (exp > 0) {
                if ((exp & 1) == 1) {
                    result = result.multiply(base);
                }
                base = base.multiply(base);
                exp >>= 1;
            }
            return result;
        }

        public boolean isOne() {
            return (this.coefficients[0] == 1) && isZeroOtherCoefficients();
        }

        public boolean isZero() {
            for (int i = 0; i < coefficients.length; i++) {
                if (coefficients[i] != 0) return false;
            }
            return true;
        }

        private boolean isZeroOtherCoefficients() {
            for (int i = 1; i < coefficients.length; i++) {
                if (coefficients[i] != 0) return false;
            }
            return true;
        }

        @Override
        public boolean equals(Object obj) {
            if (!(obj instanceof FieldElement)) {
                return false;
            }
            FieldElement other = (FieldElement) obj;
            for (int i = 0; i < n; i++) {
                if (this.coefficients[i] != other.coefficients[i]) return false;
            }
            return true;
        }

        @Override
        public int hashCode() {
            return Objects.hash(coefficients);
        }

        @Override
        public String toString() {
            StringBuilder sb = new StringBuilder();
            boolean first = true;
            for (int i = n - 1; i >= 0; i--) {
                if (coefficients[i] != 0) {
                    if (!first) {
                        sb.append(" + ");
                    }
                    if (i == 0) {
                        sb.append(coefficients[i]);
                    } else if (i == 1) {
                        if (coefficients[i] != 1) sb.append(coefficients[i]);
                        sb.append("z");
                    } else {
                        if (coefficients[i] != 1) sb.append(coefficients[i]);
                        sb.append("z^").append(i);
                    }
                    first = false;
                }
            }
            if (sb.length() == 0) {
                return "0";
            }
            return sb.toString();
        }

        public int[] getCoefficients() {
            return coefficients;
        }
    }

    static class FiniteField {
        private final int p;
        private final int n;
        private final Polynomial irreduciblePoly;
        private final List<FieldElement> elements;

        public FiniteField(int p, int n, Polynomial irreduciblePoly) {
            this.p = p;
            this.n = n;
            this.irreduciblePoly = irreduciblePoly;
            this.elements = generateElements();
        }

        private List<FieldElement> generateElements() {
            List<FieldElement> elems = new ArrayList<>();
            int total = (int) Math.pow(p, n);
            for (int i = 0; i < total; i++) {
                int[] coeffs = new int[n];
                int num = i;
                for (int j = 0; j < n; j++) {
                    coeffs[j] = num % p;
                    num /= p;
                }
                elems.add(new FieldElement(coeffs));
            }
            return elems;
        }

        public boolean isIrreducible() {
            return irreduciblePoly.isIrreducible(p);
        }

        public List<FieldElement> getElements() {
            return elements;
        }

        public FieldElement getOne() {
            int[] one = new int[n];
            one[0] = 1;
            return new FieldElement(one);
        }

        public Polynomial getIrreduciblePoly() {
            return irreduciblePoly;
        }
    }

    private static FieldElement oneElement;

    public static FieldElement getOne() {
        return oneElement;
    }

    public static void setOne(FieldElement elem) {
        oneElement = elem;
    }

    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);

        try {
            System.out.print("Введите простое число p (характеристика поля GF(p^n)): ");
            int p = scanner.nextInt();
            if (p <= 1) {
                System.out.println("Ошибка: p должно быть простым числом больше 1.");
                return;
            }
            if (!isPrime(p)) {
                System.out.println("Ошибка: Введенное число p не является простым.");
                return;
            }

            System.out.print("Введите степень расширения n (так что GF(p^n)): ");
            int n = scanner.nextInt();
            if (n < 1) {
                System.out.println("Ошибка: Степень расширения n должна быть натуральным числом (n >= 1).");
                return;
            }

            System.out.println("Введите коэффициенты неприводимого многочлена f(z) = z^n + a_(n-1)z^(n-1) + ... + a0, начиная с старшей степени:");
            int[] fCoeffs = new int[n + 1];
            for (int i = n; i >= 0; i--) {
                System.out.print("Коэффициент при z^" + i + ": ");
                fCoeffs[i] = scanner.nextInt();
                fCoeffs[i] %= p;
                if (fCoeffs[i] < 0) fCoeffs[i] += p;
            }

            Polynomial irreduciblePoly = new Polynomial(fCoeffs);

            FiniteField tempField = new FiniteField(p, n, irreduciblePoly);
            if (!tempField.isIrreducible()) {
                System.out.println("Ошибка: Введенный многочлен не является неприводимым над GF(" + p + ").");
                return;
            }

            FiniteField field = new FiniteField(p, n, irreduciblePoly);
            FieldElement.initialize(p, n, field.getIrreduciblePoly());
            setOne(field.getOne());

            System.out.print("Введите степень y (для корней y-й степени): ");
            int y = scanner.nextInt();
            if (y < 1) {
                System.out.println("Ошибка: Степень y должна быть натуральным числом (y >= 1).");
                return;
            }

            List<FieldElement> elements = field.getElements();

            List<FieldElement> roots = new ArrayList<>();
            for (FieldElement elem : elements) {
                if (elem.isZero()) {
                    continue;
                }
                FieldElement power = elem.pow(y);
                if (power.equals(oneElement)) {
                    roots.add(elem);
                }
            }

            System.out.println("\nЭлементы поля GF(" + p + "^" + n + "), удовлетворяющие условию α^" + y + " = 1:");
            if (roots.isEmpty()) {
                System.out.println("Нет корней степени " + y + " в данном поле.");
            } else {
                for (FieldElement root : roots) {
                    System.out.println(root);
                }
            }

        } catch (Exception e) {
            System.out.println("Произошла ошибка при вводе данных. Убедитесь, что вводите корректные значения.");
            System.out.println("Описание ошибки: " + e.getMessage());
        } finally {
            scanner.close();
        }
    }

    private static boolean isPrime(int num) {
        if (num <= 1) return false;
        if (num == 2) return true;
        if (num % 2 == 0) return false;
        int sqrt = (int) Math.sqrt(num);
        for (int i = 3; i <= sqrt; i += 2) {
            if (num % i == 0) return false;
        }
        return true;
    }
}