// ki/ai % p = ki * div[ai] % p
// 就是暴力做法k^i*a[i]在模p下的逆元
#include <bits/stdc++.h>
using namespace std;

using ll = long long ;
const int N = 1e5 + 50;

int ksm(int a,int b,int c) {
	int ans = 1;
	while (b) {
		if (b&1) ans = ans * b % c;
		a = a * a % c;
		b >>= 1;
	}
	return ans;
}
int main() {
	ios::sync_with_stdio(false);
	cin.tie(0);
    int n,p,k; cin >> n >> p >> k;
    int ans = 0;
    for (int i = 1;i <= n; i++) {
    	int x; cin >> x;
    	ans = (ans + k * ksm(x,p-2,p) % p)%p;
    	k = k * k % p;
    }
    cout << ans % p << " " ;
	return 0;
}