from collections import *

n, p, q = map(int, input().split())
a = list(map(int, input().split()))

num10, num9, num7, num5 = 1, 1, 1, 1
d10, d9, d7, d5 = [0] * (2 * 10**6 + 2), [0] * (2 * 10 **
                                                6 + 2), [0] * (2 * 10**6 + 2), [0] * (2 * 10**6 + 2)
for i in range(1, 2 * 10**6 + 2):
    num10 = num10 * 10 % p
    num9 = num9 * 9 % p
    num7 = num7 * 7 % p
    num5 = num5 * 5 % p
    d10[i] = num10
    d9[i] = num9
    d7[i] = num7
    d5[i] = num5

a.sort()

ans = 0
for i1 in range(n - 3):
    for i2 in range(i1 + 1, n - 2):
        for i3 in range(i2 + 1, n - 1):
            for i4 in range(i3 + 1, n):
                if (d10[a[i1]] + d9[a[i2]] + d7[a[i3]] + d5[a[i4]]) % p == q:
                    ans += 1

print(ans)