N,mod,C=map(int,input().split())
A=list(map(int,input().split()))
result=0
if C>0:
    T={}
    T[1]=1
    x=1
    for i in range(N):
        a=A[i]
        if a>0:
            x*=a
            x%=mod
            y=C*pow(x,-1,mod)
            y%=mod
            if y in T:
                result+=T[y]
            if not x in T:
                T[x]=1
            else:
                T[x]+=1
        else:
            T={}
            T[1]=1
            x=1
    print(result)
else:
    p=[1]
    print(p[1])
    pos=-1
    result=0
    for i in range(N):
        if A[i]==0:
            pos=i
        result+=pos+1
    print(result)