#MMA Contest 018 D

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

#事前に冪を求めておく
#Aw + Ax + Ay + Az の順に対応させたいので、後はよしなに
W = [pow(10, a, P) for a in A]
X = [pow( 9, b, P) for b in A]
Y = [pow( 7, c, P) for c in A]
Z = [pow( 5, d, P) for d in A]

#Zを連想配列に変換  c < dとなるdであって、5^d = Zi となる個数
D = dict()
for Zi in Z:
    if Zi not in D:
        D[Zi] = 0
    D[Zi] += 1

ans = 0
for c in range(N):
    y = Y[c]
    D[ Z[c] ] -= 1
    for b in range(c):
        x = X[b]
        for a in range(b):
            assert a < b < c
            w = W[a]

            #w + x + y + z ≡ Q mod P
            #z = Q - (w + x + y) mod P
            z = Q - (w + x + y)
            z %= P
            if z in D:
                ans += D[z]
print(ans)