import java.io.*
import java.util.*
import java.lang.*
import java.lang.Math.*

class SegTreeIntMax(val N: Int, val INIT: Int = -INF) {
    private var sg = IntArray(0)
    var size = 0
        private set
    init {
        var sz = 1
        while (sz < N) {
            sz = sz shl 1
        }
        this.size = sz
        this.sg = IntArray(sz shl 1){INIT}
    }
    fun update(i: Int, X: Int) {
        var v = i + this.size - 1
        sg[v] = X
        while (v > 0) {
            v = (v - 1) / 2
            if (sg[2 * v + 1] < sg[2 * v + 2]) {
                sg[v] = sg[2 * v + 2]
            } else {
                sg[v] = sg[2 * v + 1]
            }
        }
    }
    fun max(i: Int, j: Int, v: Int = 0, l: Int = 0, r: Int = this.size): Int {
        if (r <= i || j <= l) return -INF
        if (i <= l && r <= j) return sg[v]
        val m = (l + r) / 2
        val vl = max(i, j, 2 * v + 1, l, m)
        val vr = max(i, j, 2 * v + 2, m, r)
        return if (vl > vr)  vl else vr
    }
}

fun solve() {
    val (N, K) = rd.readListInt()
    val A = rd.readListIntCol(N)
    val AMAX = 300_000

    var lnHi = 0
    val st = SegTreeIntMax(AMAX+5, 0)
    for (i in 0 until N) {
        val L = max(A[i]-K, 0)
        val R = min(A[i]+K, AMAX)
        val ln = st.max(L, R+1)
        lnHi = max(lnHi, ln+1)
        st.update(A[i], ln+1)
    }

    val ans = lnHi
    println(ans)

    return
}


//val rd = debug.Reader("etc", "abl" , "d", "sample-1")
val rd = Reader()


fun main(args: Array<String>) {
    try {
        var exception: Throwable? = null
        val sth = Thread(null, SolveThread(), "solveThread", 128 * 1024 * 1024)
        sth.setUncaughtExceptionHandler { _, e -> exception = e }
        sth.start(); sth.join()
        if (exception != null) throw exception!! }
    catch (e: Exception) { throw e }
    finally { rd.close() }
}
const val MOD = 1_000_000_007L; const val INF = Int.MAX_VALUE/2; const val LINF = Long.MAX_VALUE/2
const val EPS = 1e-9; fun DBLEQ(a: Double, b: Double): Boolean {return abs(a - b) < EPS}
data class IntPair(val first: Int, val second: Int); data class LongPair(val first: Long, val second: Long)
data class To(val idx: Int, val cost: Long)
fun <T>edge(V: Int): Array<ArrayList<T>> { return Array(V){ArrayList<T>()} }
val errPrintln: (Any) -> Unit = { msg -> System.err.println(msg) }
fun rAssert(exp: Boolean, lazyMsg: () -> String = {""}) {
    if (!exp) { val msg = lazyMsg(); errPrintln("EAssert Error: $msg"); throw Error(msg) }
}
fun tAssert(exp: Boolean, lazyMsg: () -> String = {""}) {
    if (!exp) { val msg = lazyMsg(); errPrintln("TAssert Error: $msg"); Thread.sleep(3000) }
}
class SolveThread : Runnable {
    override fun run() { solve() }
}
class Reader {
    private val br = BufferedReader(InputStreamReader(System.`in`))
    val readString: () -> String = { br.readLine() }
    val readInt: () -> Int = { br.readLine().toInt() }
    val readLong: () -> Long = { br.readLine().toLong() }
    val readDouble: () -> Double = { br.readLine().toDouble() }
    val readListInt: () -> List<Int> = { br.readLine().split(' ').map { it.toInt() } }
    val readListLong: () -> List<Long> = { br.readLine().split(' ').map { it.toLong() } }
    val readIntArray: () -> IntArray = { readListInt().toIntArray() }
    val readLongArray: () -> LongArray = { readListLong().toLongArray() }
    val readListStringCol: (Int) -> List<String> = { N -> (0 until N).map { readString() } }
    val readListIntCol: (Int) -> List<Int> = { N -> (0 until N).map { readInt() } }
    val readListIntCols: (Int) -> List<List<Int>> = { N -> (0 until N).map { readListInt() } }
    val readListLongCol: (Int) -> List<Long> = { N -> (0 until N).map { readLong() } }
    val readListLongCols: (Int) -> List<List<Long>> = { N -> (0 until N).map { readListLong() } }
    val close: () -> Unit = { br.close() }
    protected fun finalize() { close() }
}
