#include <bits/stdc++.h>

using namespace std;

#define fst(t) std::get<0>(t)
#define snd(t) std::get<1>(t)
#define thd(t) std::get<2>(t)

using ll = long long;

template <typename T>
T expt(T a, T n, T mod = std::numeric_limits<T>::max());
template <typename T>
T inverse(T n, T mod);
std::tuple<ll,ll,ll> extgcd(ll a, ll b);

ll ti;
ll B;
ll P, R;
ll n, alpha;
std::vector<std::tuple<ll,ll>> expos;
ll table[252521];

const int dx[8] = {-1, 1, 0, 0, -1, -1, 1, 1}, dy[8] = {0, 0, -1, 1, -1, 1, -1, 1};

void init();
ll babyStepGiantStep(ll b);

int main(int argc, char** argv){
    std::cin.tie(nullptr);
    std::ios::sync_with_stdio(false);

    ti = 12;

    scanf("%lld %lld", &P, &R);
    
    init();
    
    ll g, s;
    tie(g, s, ignore) = extgcd(2ll, P-1);
    
    int Q;
    scanf("%d", &Q);
        
    for(int i=0;i<Q;++i){
        ll a, b, c;
        scanf("%lld %lld %lld", &a, &b, &c);

        ll D = (b * b - 4ll * a * c) % P;
        D = D >= 0 ? D : D + P;
        
        ll sq;

        if(D == 0){
            sq = 0;
        }else{
            ll m = babyStepGiantStep(D);
            
            if(m == -1){
                puts("-1");
                continue;
            }
            
            ll t = s * (m / g) % (P - 1);
            t = t >= 0 ? t : t + (P - 1);
            
            sq = expt(R, t, P);
        }

        ll den = inverse(2ll * a % P, P);
        
        ll x0 = (-b - sq) * den % P,
            x1 = (-b + sq) * den % P;
        x0 = x0 >= 0 ? x0 : x0 + P;
        x1 = x1 >= 0 ? x1 : x1 + P;

        if(x0 > x1){swap(x0, x1);}
        if(x0 == x1){
            printf("%lld\n", x0);
        }else{
            printf("%lld %lld\n", x0, x1);
        }
    }
}

void init(){
    B = (int)sqrt(P) * ti;
    n = P / B;
    alpha = expt(R, B, P);
    ll inv_alpha = inverse(alpha, P), R_sq = R * R % P;
    expos.resize((B + 1) / 2);
    expos[0] = std::make_tuple(1ll, 0);
    for(int i=1;i<(B+1)/2;++i){
        expos[i] = std::make_tuple(std::get<0>(expos[i-1]) * R_sq % P, i * 2);
    }
    std::sort(expos.begin(), expos.end());    
    table[0] = 1ll;
    for(int i=1;i<=n;++i){
        table[i] = table[i-1] * inv_alpha % P;
    }
}

// solve a^n = b (in F_p)
ll babyStepGiantStep(ll b){
    for(int i=0;i<=n;++i){
        ll v = b * table[i] % P;
        
        auto it = std::lower_bound(expos.begin(), expos.end(), std::make_tuple(v, 0), [](const auto& lhs, const auto& rhs){return std::get<0>(lhs) < std::get<0>(rhs);});
        
        if(it != expos.end() && std::get<0>(*it) == v){
            ll c = B * i + std::get<1>(*it);
            return c;
        }
    }

    return -1ll;
}

std::tuple<ll,ll,ll> extgcd(ll a, ll b){
    if(b == 0){
        return std::make_tuple(a, 1ll, 0ll);
    }
    auto s = extgcd(b, a % b);

    return std::make_tuple(fst(s), thd(s), snd(s)-(a/b)*thd(s));
}

template <typename T>
T expt(T a, T n, T mod){
    T res = 1;
    while(n){
        if(n & 1){res = res * a % mod;}
        a = a * a % mod;
        n >>= 1;
    }
    return res;
}

template <typename T>
inline T inverse(T n, T mod){
    return expt(n, mod-2, mod);
}