#define _USE_MATH_DEFINES
#include  <cmath>
#include <cstdio>
#include <vector>
#include <iostream>
#include <algorithm>
#include <string>
#include<math.h>
#include<iomanip>
#include<stdio.h>
#include <stdlib.h>
#include<stdio.h>
#include <queue>
#include<map>
#include <sstream>
#include<set>
#include<stack>
#include<time.h>
#include <sys/types.h>
#include <tuple>


typedef long long int ll;
//#include<bits/stdc++.h>


using namespace std;



int main()
{

    int Q;
    Q = 1;
    //cin >> Q;



    while (Q--) {
        
        int n, k;
        cin >> n >> k;
        map<int, int>mp;
        int ans = 0;
        for (int i = 0; i < n; i++) {
            int t;
            cin >> t;
            if (t - k > 0) {
                mp[t] = mp[t - k] + 1;
            }
            else mp[t]++;
            ans = max(ans, mp[t]);
        }
        cout << ans << endl;




    }

    return 0;
}