from itertools import combinations

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

m = max(A)
m10 = [1] * m
m9 = [1] * m
m7 = [1] * m
m5 = [1] * m
for i in range(1, m):
    m10[i] = m10[i-1] * 10 % P
    m9[i] = m9[i-1] * 9 % P
    m7[i] = m7[i-1] * 7 % P
    m5[i] = m5[i-1] * 5 % P

ans = 0
for a, b, c, d in combinations(A, 4):
    x = m10[a] + m9[b] + m7[c] + m5[d]
    if x % P == Q:
        ans += 1

print(ans)