// #define _GLIBCXX_DEBUG
#include <bits/stdc++.h>
using namespace std;
#include <atcoder/all>
using namespace atcoder;
using ll = long long;
#define rep(i,n) for (ll i = 0; i < (n); ++i)
using vl = vector<ll>;
using vvl = vector<vl>;
using P = pair<ll,ll>;
#define pb push_back
#define int long long
#define double long double
#define INF (ll) 3e18
// Ctrl + Shift + B コンパイル
// Ctrl + C 中断
// ./m 実行


signed main(){
  int n, m, b;
  cin >> n >> m >> b;
  vl a(n);
  rep(i,n) cin >> a[i];
  int now = 0;
  int ans = 1;
  for(auto x : a){
    int p = pow_mod(m, x, b);
    now += p;
    now %= b;
    ans += now;
    ans %= b;
  }
  cout << ans << endl;
}