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

base = [10, 9, 7, 5]
g = [[pow(base[c], A[i], P) for i in range(N)] for c in range(4)]

st = set()
st.add(g[0][0])
ans = 0
for b in range(1, N):
    for c in range(b + 1, N):
        for d in range(c + 1, N):
            Y = (g[1][b] + g[2][c] + g[3][d]) % P
            if (Q - Y) % P in st:
                ans += 1

    st.add(g[1][b])

# print(g)
print(ans)