S = input
R = range
P = print
def I(): return int(S())
def M(): return map(int, S().split())
def L(): return list(M())
def O(): return list(map(int, open(0).read().split()))
def yn(b): print("Yes" if b else "No")
biga = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
smaa = "abcdefghijklmnopqrstuvwxyz"

n, p, q = M()
a = L()
a.sort()
c = 0
for i in R(n):
	for j in R(i + 1, n):
		for k in R(j + 1, n):
			for l in R(k + 1, n):
				if (pow(10, a[i], p) + pow(9, a[j], p) + pow(7, a[k], p) + pow(5, a[l], p)) % p == q:
					c += 1
print(c)