from itertools import combinations
N,P,Q = map(int,input().split())
A = list(map(int,input().split()))
ans = 0
for x in combinations(A,4):
    if len(set(x))<4:continue
    x = sorted(x)
    if (pow(10,x[0],P)+pow(9,x[1],P)+pow(7,x[2],P)+pow(5,x[3],P))%P==Q:
        ans += 1
print(ans)