#input of int(split by space)
def get_i()
  return gets.chomp.split(" ").map(&:to_i)
end
#input of float(split by space)
def get_f()
  return gets.chomp.split(" ").map(&:to_f)
end
#input of string(split by space)
def get()
  return gets.chomp.split(" ")
end
#input of string(split per one character)
def get_nsp()
  return gets.chomp.split("")
end
#yes or no decision
def yn_judge(bool,y="Yes",n="No")
  return bool ? y : n 
end
#create of array
def array(size1,init=nil,size2=-1)
  if size2==-1
      return Array.new(size1){init}
  else
      return Array.new(size2){Array.new(size1){init}}
  end
end

def max(a,b)
    return a>b ? a : b
end

def min(a,b)
    return a>b ? b : a
end

INF=Float::INFINITY

N,K=get_i
#N=3*10**5
#K=Random.new.rand(0..3*10**5)
a=array(N)
N.times do|i|
    a[i]=gets.to_i
    #a[i]=Random.new.rand(0..3*10**5)
end
dp=Array.new(N){-1}
(N-1).times do|i|
    next unless dp[i]==-1
    dp[i]=1
    prev=i
    (i+1).upto(N-1) do|j|
        if (a[prev]-a[j]).abs<=K
            if dp[j]==-1
                dp[j]=dp[prev]+1
            else
                dp[j]=max(dp[j],dp[prev]+1)
            end
            prev=j
        end
    end
end
puts dp[N-1]