from itertools import combinations
N,P,Q=list(map(int,input().split()))
A=list(map(int,input().split()))
A.sort()

M=[[0 for _ in range(4)] for _ in range(N)]
for (i,a) in enumerate(A):
    M[i][0]=pow(10,a,P)
    M[i][1]=pow(9,a,P)
    M[i][2]=pow(7,a,P)
    M[i][3]=pow(5,a,P)

ans=0
for i in range(N):
    for j in range(i+1,N):
        for k in range(j+1,N):
            for l in range(k+1,N):
                x=M[i][0]+M[j][1]+M[k][2]+M[l][3]
                x%=P
                if x==Q:ans+=1
print(ans)