// KKGyak.cpp : This file contains the 'main' function. Program execution begins and ends there.
//
using namespace std;

#include <iostream>
#include <map>
#include <set>
#include <unordered_set>
#include <vector>
#include <algorithm>
#include <unordered_map>

int main()
{
    int n, maxL;
    cin >> n >> maxL;
	vector<int> sortedVec(n);
	for (size_t i = 0; i < n; i++)
	{
		cin >> sortedVec[i];
	}
	sort(sortedVec.begin(), sortedVec.end());
	int res = 0;
	for (size_t i = 0; i < sortedVec.size()-1;)
	{
		if (sortedVec[i+1] + sortedVec[i] <= maxL) {
			res++; 
			i += 2;
		}
		else {
			res++;
			i++;
		}
		if (i == sortedVec.size() - 1) res++;
	}
	cout << res;
}

// Run program: Ctrl + F5 or Debug > Start Without Debugging menu
// Debug program: F5 or Debug > Start Debugging menu

// Tips for Getting Started: 
//   1. Use the Solution Explorer window to add/manage files
//   2. Use the Team Explorer window to connect to source control
//   3. Use the Output window to see build output and other messages
//   4. Use the Error List window to view errors
//   5. Go to Project > Add New Item to create new code files, or Project > Add Existing Item to add existing code files to the project
//   6. In the future, to open this project again, go to File > Open > Project and select the .sln file