#include <bits/stdc++.h>

#define show(x) cerr << #x << " = " << x << endl

using namespace std;
using ll = long long;
using pii = pair<int, int>;
using vi = vector<int>;

template <typename T>
ostream& operator<<(ostream& os, const vector<T>& v)
{
    os << "sz=" << v.size() << "\n[";
    for (const auto& p : v) {
        os << p << ",";
    }
    os << "]\n";
    return os;
}

template <typename S, typename T>
ostream& operator<<(ostream& os, const pair<S, T>& p)
{
    os << "(" << p.first << "," << p.second
       << ")";
    return os;
}

constexpr ll MOD = 1e9 + 7;

template <typename T>
constexpr T INF = numeric_limits<T>::max() / 100;

ll P, R;
ll W, H;

template <typename T>
T gcd(const T a, const T b)
{
    return (b != 0) ? gcd(b, a % b) : a;
}

template <typename T>
T extgcd(const T a, const T b, T& x, T& y)  // ax+by=gcd(a,b)
{
    T d = a;
    if (b != 0) {
        d = extgcd(b, a % b, y, x);
        y -= (a / b) * x;
    } else {
        x = 1;
        y = 0;
    }
    return d;
}

template <typename T>
T inverse(const T a, const T mod)
{
    if (gcd(a, mod) != 1) {
        //        cerr << "No inverse" << endl;
        return -1;
    }
    T x, y;
    extgcd(a, mod, x, y);
    return (mod + x % mod) % mod;
}

template <typename T>
T divide(const T a, const T b, const T mod)  // return x (s.t. ax=b)(remark: x is value of modulo (mod/gcd(a, mod)))
{
    const T g = gcd(a, mod);
    if ((g + b % g) % g != 0) {
        //        cerr << "Cannot divide" << endl;
        return -1;
    } else {
        return (mod + (inverse(a / g, mod / g) * (b / g)) % mod) % mod;
    }
}


ll power(const ll a, const ll n)
{
    if (n == 0) {
        return 1;
    }
    if (n % 2 == 0) {
        const ll p = power(a, n / 2);
        return (p * p) % P;
    } else {
        return (a * power(a, n - 1)) % P;
    }
}

unordered_map<ll, ll> table;
ll step;
ll logR(const ll a)  // return log_R(a)
{
    if (a == 1) {
        return 0;
    }
    ll val = a;
    for (ll i = 0; i < W; i++) {
        if (table.find(val) != table.end()) {
            return i * H + table[val];
        } else {
            val = (val * step) % P;
        }
    }
}

pair<ll, ll> square_root(const ll a)
{
    if (a == 0) {
        return make_pair(0, 0);
    } else {
        if (P % 4 == 3) {
            const ll s = power(a, (P + 1) / 4);
            return make_pair(s, P - s);
        }

        const ll x2 = logR(a);
        return make_pair(power(R, x2 / 2), power(R, (x2 + (P - 1)) / 2));
    }
}

bool quadratic(ll n)
{
    if (n == 0) {
        return true;
    } else {
        return power(n, (P - 1) / 2) == 1;
    }
}

int main()
{
    cin >> P >> R;
    ll Q;
    cin >> Q;
    ll mini = INF<ll>;
    for (ll i = 1; i * i <= P - 1; i++) {
        const ll w = i;
        const ll h = (P - 1 + i - 1) / i;
        if (mini > h + w * Q / 10) {
            mini = h + w * Q / 10;
            H = h;
            W = w;
        }
    }

    for (ll i = 0; i < H; i++) {
        table[power(R, i)] = i;
    }
    step = power(R, (P - 1) - H);

    for (ll q = 0; q < Q; q++) {
        ll A, B, C;
        cin >> A >> B >> C;
        if (B != 0 and C != 0) {
            const ll sq = (P + (B * B - 4 * A * C) % P) % P;
            if (not quadratic(sq)) {
                cout << -1 << endl;
                continue;
            }
            const pair<ll, ll> root = square_root(sq);
            ll Z[4];
            for (int i = 0; i < 4; i++) {
                if (i % 2 == 0) {
                    if (i / 2 == 0) {
                        Z[i] = (P + (-B + root.first) % P) % P;
                    } else {
                        Z[i] = (P + (-B + root.second) % P) % P;
                    }
                } else {
                    if (i / 2 == 0) {
                        Z[i] = (P + (-B - root.first) % P) % P;
                    } else {
                        Z[i] = (P + (-B - root.second) % P) % P;
                    }
                }
            }
            vector<ll> X(4);
            for (int i = 0; i < 4; i++) {
                if (Z[i] == 0) {
                    X[i] = 0;
                } else {
                    X[i] = divide(2 * A, Z[i], P);
                }
            }
            sort(X.begin(), X.end());
            X.erase(unique(X.begin(), X.end()), X.end());
            for (ll i = 0; i < X.size(); i++) {
                if (i != 0) {
                    cout << " ";
                }
                cout << X[i];
            }
            cout << endl;
        } else if (B != 0) {
            cout << 0 << " ";
            const ll b = divide(A, -B, P);
            cout << b << endl;
        } else if (C != 0) {
            const ll x2 = divide(A, -C, P);
            if (quadratic(x2)) {
                const pair<ll, ll> root = square_root(x2);
                const ll u = root.first;
                const ll v = root.second;
                cout << min(u, v) << " " << max(u, v) << endl;
            } else {
                cout << -1 << endl;
            }
        } else {
            cout << 0 << endl;
        }
    }
    return 0;
}