#include <bits/stdc++.h>
using namespace std;
#include <atcoder/all>
using namespace atcoder;
using ll = long long;
using VI = vector<int>;
using VVI = vector<VI>;
using VL = vector<ll>;
using VVL = vector<VL>;
using VVVL = vector<VVL>;
using VD = vector<double>;
using VVD = vector<VD>;
using VS = vector<string>;
using P = pair<ll,ll>;
using VP = vector<P>;
#define rep(i, n) for (ll i = 0; i < ll(n); i++)
#define out(x) cout << x << endl
#define dout(x) cout << fixed << setprecision(10) << x << endl
#define all(a) (a).begin(),(a).end()
#define rall(a) (a).rbegin(),(a).rend()
#define sz(x) (int)(x.size())
#define re0 return 0
#define pcnt __builtin_popcountll
template<class T> inline bool chmax(T& a, T b) { if (a < b) { a = b; return 1; } return 0; }
template<class T> inline bool chmin(T& a, T b) { if (a > b) { a = b; return 1; } return 0; }
constexpr int inf = 1e9;
constexpr ll INF = 1e18;
//using mint = modint1000000007;
using mint = modint998244353;
int di[4] = {1,0,-1,0};
int dj[4] = {0,1,0,-1};

int main(){
    ll n,p,q;
    cin >> n >> p >> q;
    VL a(n);
    rep(i,n) cin >> a[i];
    sort(all(a));
    ll ans = 0;
    set<ll> st;
    for(ll i = n-1;i >= 0;i--){
        for(ll j = 0;j < i;j++)for(ll k = 0;k < j;k++){
            ll now = pow_mod(10,a[k],p)+pow_mod(9,a[j],p)+pow_mod(7,a[i],p);
            now %= p;
            ll rem = (q-now+p)%p;
            if(st.count(rem)) ans++;
        }
        st.insert(pow_mod(5,a[i],p));
    }
    out(ans);
}