C

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

int main()
{
    int n, m;
    cin>>n>>m;
    vector<int> a(n);
    for(auto &e: a) cin>>e;

    sort(a.begin(), a.end());

    int ans = 0;
    int i = 0;
    for(auto e: a)
    {
        int x = lower_bound(a.begin(), a.end(), e+m) - a.begin() - (i++);
        ans = max(ans, x);
    }
    cout<<ans<<"\n";
}