#include<bits/stdc++.h>
using namespace std;
#define rep(i,n) for(ll i=0;i<n;i++)
#define repl(i,l,r) for(ll i=(l);i<(r);i++)
#define per(i,n) for(ll i=(n)-1;i>=0;i--)
#define perl(i,r,l) for(ll i=r-1;i>=l;i--)
#define fi first
#define se second
#define ins insert
#define pqueue(x) priority_queue<x,vector<x>,greater<x>>
#define all(x) (x).begin(),(x).end()
#define CST(x) cout<<fixed<<setprecision(x)
#define rev(x) reverse(x);
using ll=long long;
using vl=vector<ll>;
using vvl=vector<vector<ll>>;
using pl=pair<ll,ll>;
using vpl=vector<pl>;
using vvpl=vector<vpl>;
const ll MOD=1000000007;
const ll MOD9=998244353;
const int inf=1e9+10;
const ll INF=4e18;
const ll dy[9]={1,0,-1,0,1,1,-1,-1,0};
const ll dx[9]={0,1,0,-1,1,-1,1,-1,0};
template <typename T> inline bool chmax(T &a, T b) {
  return ((a < b) ? (a = b, true) : (false));
}
template <typename T> inline bool chmin(T &a, T b) {
  return ((a > b) ? (a = b, true) : (false));
}

ll modpow(ll a,ll n, ll mod) {
  a%=mod;if(a==0)return 0;
  ll res = 1;
  while (n > 0) {
      if (n & 1) res = res * a % mod;
      a = a * a % mod;
      n >>= 1;
  }
  return res;
}
ll p,r;
ll safemod(ll x){
  return (x%p+p)%p;
}
unordered_map<ll,ll> mp;
ll modlog(ll s){
  ll f=1;
  if(mp.size()==0){
    rep(i,1000000){
      mp[f]=i;
      f=f*r%p;
    }
  }
  ll dif=modpow(r,1000000,p);
  dif=modpow(dif,p-2,p);
  f=s;
  rep(i,1000){
    if(mp.count(f)){
      return (mp[f]+i*1000000)%(p-1);
    }
    f=f*dif%p;
  }
}
void solve(){
  ll a,b,c;cin >> a >> b >> c;
  ll s=safemod(b*b-4*a*c);
  if(s==0){
    cout << safemod(-b*modpow(a*2,p-2,p)) << endl;return;
  }
  ll k=modlog(s);
  if(k&1){
    cout << -1 << endl;
    return ;
  }
  //cout << k << endl;
  ll x=k/2,y=(k+p-1)/2;
  x=modpow(r,x,p),y=modpow(r,y,p);
  vl ans={x,-x,y,-y};
  ll inva=modpow(a*2,p-2,p);
  rep(i,4){
    ans[i]=safemod((ans[i]-b)*inva);
  }
  sort(all(ans));ans.erase(unique(all(ans)),ans.end());
  for(auto p:ans)cout << p << " ";cout << endl;
}
int main(){
  cin >> p >> r;
  ll t;cin >> t;
  while(t--)solve();
}