#include <bits/stdc++.h>
using namespace std;

#define rep(i, a, b) for (int i = a; i < b; i++)
using ll = long long;

int main(){
	ll n, m, t;
	cin >> n >> m >> t;
	vector<int> a(m);
	rep(i, 0, m) cin >> a[i];
	vector<ll> b(n + 1);
    ll ma = 0, mi = 1e18, z = 0;
	rep(i, 0, m) {
		b[a[i]]++;   
		ma = max(ma, b[a[i]]);
	}
    rep(i, 1, n + 1) {
        mi = min(mi, b[i]);
        if(b[i] == 0) z++;
    }
    ll ans = ma;
    if(n > 1) {
        rep(i, 0, ma + 1) {
            if(z) ans = min(ans, max(ma - i, (z + i - 1) / z));
            else ans = min(ans, max(ma - i, i * t + mi));
        }
    }
	cout << ans << endl;
}