#include<bits/stdc++.h>
using namespace std;
using ll = long long;
using ld = long double;
#ifdef LOCAL
#include <algo/debug.h>
#else
#define debug(...) void(0)
#endif
#include<atcoder/all>
using namespace atcoder;

int main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    ll N, P, Q; cin >> N >> P >> Q;
    vector<ll> A(N); for(int i = 0; i < N; i++) cin >> A[i];
    sort(A.begin(), A.end());
    const ll n = 2 * 1'000'000;
    vector<vector<ll>> rec(11, vector<ll>(n + 1, 1));
    for(int i = 5; i <= 10; i++) {
        for(int j = 0; j < n; j++) {
            rec[i][j + 1] = (rec[i][j] * i) % P;
        }
    }
    ll ans = 0;
    for(int i = 0; i < N; i++) {
        for(int j = i + 1; j < N; j++) {
            for(int k = j + 1; k < N; k++) {
                for(int l = k + 1; l < N; l++) {
                    ll t = rec[10][A[i]] + rec[9][A[j]] + rec[7][A[k]] + rec[5][A[l]]; t %= P;
                    if(t == Q) ans++;
                }
            }
        }
    }
    cout << ans << endl;
}