#include<bits/stdc++.h>
#define ll long long
#define ss second
#define ff first
#define pb push_back
#define endl "\n"
#define mod 1000000007
using namespace std;
ll a[200005],n,sum2,m,h,sum,l;
int main(){
ios::sync_with_stdio(false);
cout.tie(0);
cin.tie(0);
cin>>n>>m;
for(ll i=1;i<=n;i++){
cin>>a[i];
}
for(ll i=1;i<=n;i++){
if(l+m<a[i]){
l+=m;sum++;
}
else
{
l=a[i];
}
}
l=a[n];
sum2=n;
for(ll i=n-1;i>0;i--){
//cout<<l<<"\n";
if(l-m<=a[i]){
//cout<<l;
l-=m;
}
else
{
l=a[i]; sum2--;
}
}
cout<<min(sum,sum2);
}
