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

#define INF 1000000010
#define EPS 1e-9

#define debug(x) cout<<x<<endl;
#define repi(i,x,n) for(int i=x;i<n;i++)
#define rep(i,n) repi(i,0,n)
#define lp(i,n) repi(i,0,n)
#define repn(i,n) for(int i=n;i>=0;i--)
#define int long long
#define endl "\n"

int op(int a, int b) { return max(a, b); }
int e() { return -1; }

typedef pair<int,int> PII;
typedef pair<int,string> PIS;
typedef pair<string,int> PSI;


signed main(){
  cin.tie(0);	
  ios::sync_with_stdio(false);
  int n,k;
  cin>>n>>k;
  
  segtree<int, op, e> seg(300010);

  int ans=0;
  
  rep(i,n){
    int x;
    cin>>x;
    int l=max(0,x-k);
    int r=min(300010,x+k+1);
    int g=seg.prod(l,r);
    int d=g+1;
    seg.set(x,d);
    if(ans>d) ans=d;
  }
  cout<<ans<<endl;


  return 0;
}
