#pragma GCC diagnostic ignored "-Wunused-variable"
#pragma GCC diagnostic ignored "-Wunused-parameter" 
#include <bits/stdc++.h>
//#include <atcoder/all>
using namespace std;
//using namespace atcoder;

#define BOOST
#ifdef BOOST
#include <boost/multiprecision/cpp_int.hpp>
#include <boost/multiprecision/cpp_dec_float.hpp>
using ml = boost::multiprecision::cpp_int;
using md = boost::multiprecision::cpp_dec_float_100;
#endif

/***** type *****/
using ll = long long;
using ld = long double;
using pll = pair<long long, long long>;
template <class T> using vt = vector<T>;
template <class T> using vvt = vector<vector<T>>;
template <class T> using vvvt = vector<vector<vector<T>>>;
using mg = vector<vector<long long>>;
using lg = vector<vector<long long>>;
using wlg = vector<vector<pair<long long, long long>>>;
/***** define *****/
#define all(c) (c).begin(), (c).end()            // begin to end
#define coutld cout << fixed << setprecision(10) // cout double
#define output(x) do { cout << x << endl; exit(0); } while(0)
#define rep(i, b, e) for (ll i = b; i < e; i++)  // repeat
#define repr(i, b, e) for (ll i = b; e < i; i--) // repeat reverse
#define fori(i, ...) if (ll i = -1) for(__VA_ARGS__) if (i++, 1)
#define each(i, e, c) fori (i, auto&& e: c)      // for each
/***** const value *****/
#define llong_max 9223372036854775807            // 9 * 10^18
#define ldbl_max 1.79769e+308                    // 1.7 * 10^308
#define pi 3.1415926535897932                    // 3.14 ...
/***** lambda *****/
auto Ceil = [] // if (a % b != 0) return a / b + 1;
(auto x) { return (ll)ceil(x); };
auto Count = [] // long long count value
(auto b, auto e, auto x) { return (ll)count(b, e, x); };
auto CtoL = [] // char to number
(auto c) { return (ll)c - (ll)'0'; };
auto LtoC = [] // number to char
(auto n) { return (char)('0' + n); };
auto Pow = [] // long long pow
(auto a, auto b) { return (ll)pow(a, b); };
auto Pow2 = [] // long long pow2
(auto n) { return (1LL << n); };
auto Pow10 = [] // long long pow10
(auto n) { return (ll)pow(10, n); };
auto Size = []  // long long collection size
(auto& c) { return (ll)(c).size(); };
auto Sum = [] // long long accumulate
(auto b, auto e) { return accumulate(b, e, 0LL); };

/***** operator *****/
template <class T, class S> pair<T, S> operator + (pair<T, S> l, pair<T, S> r)
{	// pair<T, S> + pair<T, S>
	return { l.first + r.first, l.second + r.second };
}
template <class T, class S> pair<T, S> operator - (pair<T, S> l, pair<T, S> r)
{	// pair<T, S> - pair<T, S>
	return { l.first - r.first, l.second - r.second };
}
/***** template *****/
template <class A, class B, class C> struct triple
{	// tuple<A, B, C>
	A a = A(); B b = B(); C c = C();
};
template <class T> void MakeVVT
(ll ys, ll xs, vvt<T>& v, T fill = T())
{	// vector<vector<T>> resize + fill
	v.resize(ys); rep(y, 0, ys) v[y].resize(xs, fill);
}
template <class T> void MakeVVVT
(ll zs, ll ys, ll xs, vvvt<T>& v, T fill = T())
{	// vector<vector<vector<T>>> resize + fill
	v.resize(zs); rep(z, 0, zs) MakeVVT(ys, xs, v[z], fill);
}
template <class T> void InputVVT
(ll ys, ll xs, vvt<T>& v, T fix = T())
{	// input vector<vector<T>> (T != struct) + fix
	MakeVVT(ys, xs, v, fix);
	rep(y, 0, ys) rep(x, 0, xs) { cin >> v[y][x]; v[y][x] += fix; }
}
template <class T> void InputVVVT
(ll zs, ll ys, ll xs, vvvt<T>& v, T fix = T())
{	// input vector<vector<vector<T>>> (T != struct) + fix
	v.resize(zs); rep(z, 0, zs) InputVVT(ys, xs, v[z], fix);
}

/**************************************/
/********** BEGIN OF NYA LIB **********/
/**************************************/

namespace NyaGadget {}

namespace NyaGadget
{
	template <class S, S(*op)(S, S), S(*e)(), class F, S(*mapping)(F, S), F(*composition)(F, F), F(*id)()> struct DS_NyaaLST
	{
	public:
		DS_NyaaLST() : DS_NyaaLST(0) {}
		DS_NyaaLST(int n) : DS_NyaaLST(std::vector<S>(n, e())) {}
		DS_NyaaLST(const std::vector<S>& v) : _n(int(v.size()))
		{
			log = ceil_pow2(_n);
			size = 1 << log;
			d = std::vector<S>(2 * size, e());
			lz = std::vector<F>(size, id());
			for (int i = 0; i < _n; i++) d[size + i] = v[i];
			for (int i = size - 1; i >= 1; i--) {
				update(i);
			}
		}

		void set(int p, S x)
		{
			assert(0 <= p && p < _n);
			p += size;
			for (int i = log; i >= 1; i--) push(p >> i);
			d[p] = x;
			for (int i = 1; i <= log; i++) update(p >> i);
		}

		S get(int p)
		{
			assert(0 <= p && p < _n);
			p += size;
			for (int i = log; i >= 1; i--) push(p >> i);
			return d[p];
		}

		S prod(long long L, long long R)
		{	// long long -> int 型変換
			int l = (int)L; int r = (int)R;
			assert(0 <= l && l <= r && r <= _n);
			if (l == r) return e();

			l += size;
			r += size;

			for (int i = log; i >= 1; i--) {
				if (((l >> i) << i) != l) push(l >> i);
				if (((r >> i) << i) != r) push(r >> i);
			}

			S sml = e(), smr = e();
			while (l < r) {
				if (l & 1) sml = op(sml, d[l++]);
				if (r & 1) smr = op(d[--r], smr);
				l >>= 1;
				r >>= 1;
			}

			return op(sml, smr);
		}

		S all_prod() { return d[1]; }

		void apply(int p, F f)
		{
			assert(0 <= p && p < _n);
			p += size;
			for (int i = log; i >= 1; i--) push(p >> i);
			d[p] = mapping(f, d[p]);
			for (int i = 1; i <= log; i++) update(p >> i);
		}

		void apply(long long L, long long R, F f)
		{	// long long -> int 型変換
			int l = (int)L; int r = (int)R;
			assert(0 <= l && l <= r && r <= _n);
			if (l == r) return;

			l += size;
			r += size;

			for (int i = log; i >= 1; i--)
			{
				if (((l >> i) << i) != l) push(l >> i);
				if (((r >> i) << i) != r) push((r - 1) >> i);
			}

			{
				int l2 = l, r2 = r;
				while (l < r) {
					if (l & 1) all_apply(l++, f);
					if (r & 1) all_apply(--r, f);
					l >>= 1;
					r >>= 1;
				}
				l = l2;
				r = r2;
			}

			for (int i = 1; i <= log; i++)
			{
				if (((l >> i) << i) != l) update(l >> i);
				if (((r >> i) << i) != r) update((r - 1) >> i);
			}
		}

		template <bool (*g)(S)> int max_right(int l)
		{
			return max_right(l, [](S x) { return g(x); });
		}

		template <class G> int max_right(int l, G g) {
			assert(0 <= l && l <= _n);
			assert(g(e()));
			if (l == _n) return _n;
			l += size;
			for (int i = log; i >= 1; i--) push(l >> i);
			S sm = e();
			do {
				while (l % 2 == 0) l >>= 1;
				if (!g(op(sm, d[l]))) {
					while (l < size) {
						push(l);
						l = (2 * l);
						if (g(op(sm, d[l]))) {
							sm = op(sm, d[l]);
							l++;
						}
					}
					return l - size;
				}
				sm = op(sm, d[l]);
				l++;
			} while ((l & -l) != l);
			return _n;
		}

		template <bool (*g)(S)> int min_left(int r)
		{
			return min_left(r, [](S x) { return g(x); });
		}

		template <class G> int min_left(int r, G g) {
			assert(0 <= r && r <= _n);
			assert(g(e()));
			if (r == 0) return 0;
			r += size;
			for (int i = log; i >= 1; i--) push((r - 1) >> i);
			S sm = e();
			do {
				r--;
				while (r > 1 && (r % 2)) r >>= 1;
				if (!g(op(d[r], sm))) {
					while (r < size) {
						push(r);
						r = (2 * r + 1);
						if (g(op(d[r], sm))) {
							sm = op(d[r], sm);
							r--;
						}
					}
					return r + 1 - size;
				}
				sm = op(d[r], sm);
			} while ((r & -r) != r);
			return 0;
		}
	private:
		int _n, size, log;
		std::vector<S> d;
		std::vector<F> lz;
		void update(int k) { d[k] = op(d[2 * k], d[2 * k + 1]); }
		void all_apply(int k, F f)
		{
			d[k] = mapping(f, d[k]);
			if (k < size) lz[k] = composition(f, lz[k]);
		}
		void push(int k)
		{
			all_apply(2 * k, lz[k]);
			all_apply(2 * k + 1, lz[k]);
			lz[k] = id();
		}
		// @param n `0 <= n`
		// @return minimum non-negative `x` s.t. `n <= 2**x`
		int ceil_pow2(int n)
		{
			int x = 0;
			while ((1U << x) < (unsigned int)(n)) x++;
			return x;
		}
	};
}

/**************************************/
/*********** END OF NYA LIB ***********/
/**************************************/

using namespace NyaGadget;
//using mll = NT_ModLL< 1000000007 >;
//using mll = NT_ModLL< 998244353 >;

// LST定義（範囲更新、範囲最大値取得）
using TypeLST = long long;
const TypeLST LST_INF = 8e18;
const TypeLST LST_ID = 8e18;
TypeLST op(TypeLST a, TypeLST b) { return std::max(a, b); }
TypeLST el() { return -LST_INF; }
TypeLST mapping(TypeLST f, TypeLST x) { return (f == LST_ID ? x : f); }
TypeLST composition(TypeLST f, TypeLST g) { return (f == LST_ID ? g : f); }
TypeLST id() { return LST_ID; }

int main()
{
	ll N, K; cin >> N >> K;
	vt<ll> A(N); each(i, e, A) cin >> e;
	DS_NyaaLST<TypeLST, op, el, TypeLST, mapping, composition, id> lst(vt<TypeLST>(300000 + 2));
	
	lst.apply(A[0], A[0] + 1, 1);
	rep(i, 1, Size(A)) lst.apply(A[i], A[i] + 1, lst.prod(max(0LL, A[i] - K), min(300000LL + 1, A[i] + K + 1)) + 1);

	ll ans = 0;
	rep(i, 0, Size(A)) ans = max(ans, lst.prod(A[i], A[i] + 1));
	cout << ans;
	return 0;
}


Measured memory_bytes: 20156