N, P, Q = map(int, input().split())
A = list(map(int, input().split()))
A.sort()
five = [pow(5, i, P) for i in range(2000001)]
seven = [pow(7, i, P) for i in range(2000001)]
nine = [pow(9, i, P) for i in range(2000001)]
ten = [pow(10, i, P) for i in range(2000001)]
ans = 0
for a in range(N):
    for b in range(a + 1, N):
        for c in range(b + 1, N):
            for d in range(c + 1, N):
                tmp = ten[A[a]] + nine[A[b]] + seven[A[c]] + five[A[d]]
                if tmp % P == Q:
                    ans += 1
print(ans)