#include <bits/stdc++.h>
using namespace std;
using i64 = long long;
#define rep(i,s,e) for(i64 (i) = (s);(i) < (e);(i)++)
#define all(x) x.begin(),x.end()
#define STRINGIFY(n) #n
#define TOSTRING(n) STRINGIFY(n)
#define PREFIX "#" TOSTRING(__LINE__) "| "
#define debug(x) \
{ \
  std::cout << PREFIX << #x << " = " << x << std::endl; \
}

std::ostream& output_indent(std::ostream& os, int ind) {
  for(int i = 0; i < ind; i++) os << " ";
  return os;
}

template<class S, class T> std::ostream& operator<<(std::ostream& os, const std::pair<S, T>& p);
template<class T> std::ostream& operator<<(std::ostream& os, const std::vector<T>& v);

template<class S, class T> std::ostream& operator<<(std::ostream& os, const std::pair<S, T>& p) {
  return (os << "(" << p.first << ", " << p.second << ")");
}
template<class T> std::ostream& operator<<(std::ostream& os, const std::vector<T>& v) {
  os << "[";
  for(int i = 0;i < v.size();i++) os << v[i] << ", ";
  return (os << "]");
}

template<class T>
static inline std::vector<T> ndvec(size_t&& n, T val) { return std::vector<T>(n, std::forward<T>(val)); }
template<class... Tail>
static inline auto ndvec(size_t&& n, Tail&&... tail) {
  return std::vector<decltype(ndvec(std::forward<Tail>(tail)...))>(n, ndvec(std::forward<Tail>(tail)...));
}
template<class Cond> struct chain {
  Cond cond; chain(Cond cond) : cond(cond) {}
  template<class T> bool operator()(T& a, const T& b) const { if(cond(a, b)) { a = b; return true; } return false; }
};
template<class Cond> chain<Cond> make_chain(Cond cond) { return chain<Cond>(cond); }

#include <vector>
#include <tuple>

struct union_find {
  std::vector<int> par;
  union_find(int N): par(N, -1) {}
  int root(int x) {
    return par[x] < 0 ? x : par[x] = root(par[x]);
  }
  std::tuple<int, int> unite(int x, int y) {
    x = root(x);
    y = root(y);
    if(x == y) return { -1, -1 };
    if(par[x] > par[y]) std::swap(x, y);
    par[x] += par[y];
    par[y] = x;
    return { x, y };
  }
  int size(int x) {
    return -par[root(x)];
  }
};

#include <vector>
using i64 = long long;


template<class T, class Ope, const T& Ide>
struct segment_tree {
  Ope ope;
 
  i64 n;
  std::vector<T> node;
  

  segment_tree(const std::vector<T>& init) {
    n = 1;
    while(n < init.size()) n *= 2;
    node.resize(2 * n, Ide);
    for(int i = 0;i < init.size();i++) node[i + n] = init[i];
    for(int i = n - 1; i >= 1;i--) node[i] = ope(node[i * 2], node[i * 2 + 1]);
  }
 

  void update(i64 i, T x) {
    i += n;
    node[i] = x;
    while(i > 1) {
      i = i / 2;
      node[i] = ope(node[i * 2], node[i * 2 + 1]);
    }
  }

  T at(i64 i) const { return node[i + n]; }

  T sum(i64 l, i64 r) const {
    T lx = Ide;
    T rx = Ide;
    l += n;
    r += n;
    while(l < r) {
      if(l & 1) { lx = ope(lx, node[l++]); }
      if(r & 1) { rx = ope(node[--r], rx); }
      l >>= 1;
      r >>= 1;
    }
    return ope(lx, rx);
  }
};

constexpr i64 IDE = 0;

struct max_ope {
  i64 operator()(i64 a, i64 b) const { return std::max(a, b); } 
};

using segtree = segment_tree<i64, max_ope, IDE>;

int main() {
  i64 N, K;
  cin >> N >> K;
  vector<i64> A(N);
  rep(i,0,N) {
    cin >> A[i];
    A[i]--;
  }

  segtree seg(vector<i64>(303030, 0));

  rep(i,0,N) {
    i64 left = std::max(0ll, A[i] - K);
    i64 right = std::min(303030ll, A[i] + K + 1);
    seg.update(A[i], seg.sum(left, right) + 1);
  }
  cout << seg.sum(0, 303030) << endl;
}
