#include <bits/stdc++.h>
using namespace std;
#define rep(i, n) for(int i=0;i<n;i++)
#define int long long

signed main() {
	int n, x;
	cin >> n >> x;
	vector<int> a(n);
	int xs = 0, ns = 0, ans = 0;
	rep(i, n) {
		cin >> a[i];
		xs += a[i]/x;
		ns += a[i]%x;
	}

	
	if (ns >= xs) {
		cout << xs << "\n";
		return 0;
	}
	if ((xs-ns) % (x+1) == 0) {
		cout << xs - (xs-ns)/(x+1) << "\n";
	} else {
		cout << xs - ((xs-ns)/(x+1)+1) << "\n";
	}

	//cout << ((1+2)+(23)) << "asd";

	return 0;
}