N, P, Q = map(int, input().split())
A = list(map(int, input().split()))
X = [0] * P
ans = 0
for i in range(1, N - 2):
    X[(Q-pow(10,A[i-1],P))%P] += 1
    tmp1 = pow(9,A[i],P)
    for j in range(i + 1, N - 1):
        tmp2 = tmp1 + pow(7,A[j],P)
        tmp2 %= P
        for k in range(j + 1, N):
            tmp3 = tmp2 + pow(5,A[k],P)
            tmp3 %= P
            ans += X[tmp3]
print(ans)