#include <bits/stdc++.h>
using namespace std;
#define all(x) x.begin(), x.end()
#define mod 1000000007
#define sp << " " <<
#define endl << '\n'
signed main() {
ios_base::sync_with_stdio(false);
cin.tie(0);
cout.tie(0);
long long int N, D;
vector<long long int> LISmanuplated;
vector<long long int> LISnormal;
LISmanuplated.push_back(0);
LISnormal.push_back(0);
cin >> N >> D;
for (int i = 0; i < N; i++){
long long int in;
cin >> in;
auto k = lower_bound(all(LISnormal), in + D);
if (k == LISnormal.end()){
LISnormal.push_back(in + D);
}else{
*k = in + D;
}
k = lower_bound(all(LISnormal), in);
if (k == LISnormal.end()){
LISnormal.push_back(in);
}else{
*k = in;
}
}
cout << LISnormal.size() - 1;
return 0;
}
