#include<bits/stdc++.h>
namespace {
#pragma GCC diagnostic ignored "-Wunused-function"
#include<atcoder/all>
#pragma GCC diagnostic warning "-Wunused-function"
using namespace std;
using namespace atcoder;
#define rep(i,n) for(int i = 0; i < (int)(n); i++)
#define rrep(i,n) for(int i = (int)(n) - 1; i >= 0; i--)
#define all(x) begin(x), end(x)
#define rall(x) rbegin(x), rend(x)
template<class T> bool chmax(T& a, const T& b) { if (a < b) { a = b; return true; } else return false; }
template<class T> bool chmin(T& a, const T& b) { if (b < a) { a = b; return true; } else return false; }
using ll = long long;
using P = pair<int,int>;
using VI = vector<int>;
using VVI = vector<VI>;
using VL = vector<ll>;
using VVL = vector<VL>;

} int main() {
  ios::sync_with_stdio(false);
  cin.tie(0);
  int n, m, t;
  cin >> n >> m >> t;
  VI f(n);
  rep(i, m) {
    int x;
    cin >> x;
    f[x-1]++;
  }
  ll l = 0, r = (ll)m * t;
  while (r - l > 1) {
    ll c = (l + r) / 2;
    ll todo = 0;
    for (int x : f) {
      ll v = c - x;
      if (v >= 0) {
        todo -= v / t;
        chmax<ll>(todo, -m);
      } else {
        todo += -v;
      }
    }
    (todo > 0 ? l : r) = c;
  }
  cout << r << '\n';
}