#include <bits/stdc++.h>
using namespace std;
#define int long long
//#define all(x) x.begin(),x.end()
//#define rall(x) x.rbegin(),x.rend()
//#define ff first
//#define ss second
//#define pb push_back
//template<class T, class U> inline bool chmin(T& a, const U& b) { if (a > b) { a = b; return true; } return false; }
//template<class T, class U> inline bool chmax(T& a, const U& b) { if (a < b) { a = b; return true; } return false; }
//mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
//#define rnd(l, r) uniform_int_distribution <int> (l, r)(rng)
//const int inf = 1e18, mod = 1e9+7;
void solve(){
int n, m;
cin >> n >> m;
int l = 0, ans = 0;
bool cant = 1;
for(int i = 0; i < n; i++){
int x;
cin >> x;
if(l+m < x){
if(cant){
l = l+m;
}else l = x;
ans++;
}else{
l = x;
cant = 0;
}
}
cout << ans << '\n';
};
signed main() {
ios_base::sync_with_stdio(false);
cin.tie(nullptr);cout.tie(nullptr);
int tt = 1;
//cin >> tt;
while(tt--){
solve();
};
}
