# include <bits/stdc++.h>
using namespace std;
/*************************************************************************************/
# define endl "\n"
# define io_boost std::ios_base::sync_with_stdio(false);cin.tie(nullptr);cout.tie(nullptr);
typedef unsigned long long int ulli;
typedef long long int lli;
/*************************************JUANKIPEDIA*************************************/
const int MAXN = 200005;
int N, J;
lli a[MAXN];
int main(){
io_boost;
cin >> N >> J;
for(int i = 0; i < N; i++) cin >> a[i];
lli c = 0;
int ans = 0;
for(int i = 0; i < N; i++){
if(a[i] > (c + J)) ans++, a[i] = c + J;
c = a[i];
}
cout << ans << endl;
return 0;
}
