import sys
input=sys.stdin.readline

n,k=map(int,input().split())
a=[int(input()) for i in range(n)]


def segfunc(x, y):
    return max(x,y)

def init(init_val):
    # set_val
    for i in range(n):
        seg[i+num-1] = init_val[i]
    # built
    for i in range(num-2, -1, -1):
        seg[i] = segfunc(seg[2*i+1], seg[2*i+2])

def update(k, x):
    k += num - 1
    seg[k] = x
    while k:
        k = (k-1)//2
        seg[k] = segfunc(seg[2*k+1], seg[2*k+2])

def query(p, q):
    if q <= p:
        return ide_ele
    p += num - 1
    q += num - 2
    res = ide_ele
    while q-p>1:
        if p&1 == 0:
            res = segfunc(res, seg[p])
        if q&1 == 1:
            res = segfunc(res, seg[q])
            q -= 1
        p = p//2
        q = (q-1)//2
    if p == q:
        res = segfunc(res, seg[p])
    else:
        res = segfunc(segfunc(res, seg[p]), seg[q])
    return res

# identity element
ide_ele = 0

# num: n以上の最小の2のべき乗
num = 2**(n-1).bit_length()
seg = [ide_ele]*2*num

lst=init([0]*300010)    #aはリスト


for i in a:
    l=max(0,i-k)
    r=min(300000,i+k)
    pin=query(l,r+1)+1
    update(i,pin)


print(max(seg))
