import sys
input = lambda : sys.stdin.readline().rstrip()

sys.setrecursionlimit(2*10**5+10)
write = lambda x: sys.stdout.write(x+"\n")
debug = lambda x: sys.stderr.write(x+"\n")
writef = lambda x: print("{:.12f}".format(x))

### 離散対数問題
def gcd2(a, b):
    """a*x + b*y = gcd(a,b)なるx,yも求める
    """
    l = []
    while b:
        l.append(divmod(a,b))
        a, b = b, a%b
    x, y = 1, 0
    for aa,bb in l[::-1]:
        x, y = y, x - aa*y
    return a, x, y

def modinv(x, M):
    """素数ではないM、Mと互いに素なxに対し
    x * y == 1 mod M なるyを求める
    """
    a,xx,yy = gcd2(x,M)
    return a,xx%M
def dlog(x,y,M):
    """互いに素なx,Mに対してpow(x,i,M)==y なる最小のiを返す
    存在しない場合Noneを返す
    """
    l = int(M**0.5)+1
    d = {}
    v = 1
    for i in range(l+1):
        d[v] = i
        v *= x
        v %= M
    v = y
    _,tmp = modinv(pow(x,l,M), M)
    for i in range(l+1):
        if v in d:
            vv = 1
            for j in range(l+1):
                if vv==v:
                    break
                vv *= x
                v %= M
            return i*l + j
        v *= tmp
        v %= M
    return None

def sub(a,b,c):
    ainv = pow(a, p-2, p)
    b = b * ainv % p
    c = c * ainv % p
    v = (b*b*inv4 - c)%p
    if v==0:
        return (-b*inv2)%p
    res = dlog(r,v,p)
    if res is None:
        return -1
    elif res%2==1:
        return -1
    kk1 = res//2
    kk2 = (res+p-1)//2
    bb = b * inv2 % p
    x1 = pow(r, kk1, p) - bb
    x2 = pow(r, kk2, p) - bb
#     print(res, v, r, kk1, kk2)
    return " ".join(sorted(map(str,(x1%p, x2%p))))
p,r = list(map(int, input().split()))
q = int(input())
inv4 = pow(4, p-2, p)
inv2 = pow(2, p-2, p)
ans = []
for i in range(q):
    a,b,c = map(int, input().split())
    ans.append(sub(a,b,c))
write("\n".join(map(str, ans)))