from itertools import combinations

N, P, Q = map(int, input().split())
A = list(map(int, input().split()))

M = max(A)+1
pow_10, pow_9, pow_7, pow_5 = [1]*M, [1]*M, [1]*M, [1]*M
for i in range(M-1):
    pow_10[i+1] = pow_10[i]*10 % P
    pow_9[i+1] = pow_9[i]*9 % P
    pow_7[i+1] = pow_7[i]*7 % P
    pow_5[i+1] = pow_5[i]*5 % P

ans = 0
for a, b, c, d in combinations(A, 4):
    if (pow_10[a] + pow_9[b] + pow_7[c] + pow_5[d]) % P == Q:
        ans += 1
print(ans)