#include<bits/stdc++.h>
using namespace std;
inline int read()
{
	int x=0,f=1;
	char ch=getchar();
	while(ch<48||ch>57)
	{
		if(ch==45)f=-1;
		ch=getchar();
	}
	while(ch>=48&&ch<=57)
	{
		x=(x<<1)+(x<<3)+(ch&15);
		ch=getchar();
	}
	return x*f;
}
inline void write(int x)
{
	if(x<0)x=-x,putchar(45);
	if(x>9)write(x/10);
	putchar(x%10+48);
	return;
}
inline int qpow(int x,int y,int mod)
{
	int res=1;
	while(y)
	{
		if(y&1)res=1ll*res*x%mod;
		x=1ll*x*x%mod;
		y>>=1;
	}
	return res%mod;
}
int main()
{
	//freopen("equation.in","r",stdin);
	//freopen("equation.out","w",stdout);
	int p=read(),r=read(),q=read();
	while(q--)
	{
		int a=read(),b=read(),c=read(),cnt=0;
		for(int x=0;x<p;++x)
			if((a*x%p*x%p+b*x%p+c%p)%p==0)
				++cnt,write(x),putchar(' ');
		puts(cnt?"":"-1");
	}
	return 0;
}