// UUID: 82be7e4d-42ff-4d26-aed0-0c95bbfbcc3e
#include <algorithm>
#include <bits/stdc++.h>
using namespace std;
//#define int long long
//#define INT_MIN LLONG_MIN
//#define INT_MAX LLONG_MAX

int32_t main() {
    ios::sync_with_stdio(false);
    cin.tie(0);
	int n,x;
    cin >> n >> x;
    vector<int> v(n);
    for (int i=0; i<n; i++) {
        cin >> v[i];
    }
    sort(v.begin(),v.end());
    for (auto e:v) cerr << e << ' ';
    int l=0, r=n-1;
    int count = 0;
    while (l <= r) {
        while (l<=r&&v[r]<x) r--;
        if (l > r) break;
        if (l == r) {
            if (v[l] >= x + 1) count++;
            break;
        }
        if (v[l] >= 1 && v[r] >= x) {
            v[l] -= 1;
            v[r] -= x;
            count++;
            if (v[l] == 0) l++;
            if (v[r] == 0) r--;
        } else {
            break;
        }
    }
    cout << count;
}