#include <bits/stdc++.h>
#define int int64_t
using ll = int64_t;
using namespace std;
constexpr int maxn = 1E5 + 1;
void orz() {
int n, k;
cin >> n >> k;
vector <int> a(n + 1);
for(int i = 1; i <= n; i++ ){
cin >> a[i];
}
int ans = 0;
if(a[1] > k) {
a[1] = k;
ans++;
}
for(int i = 2; i <= n; i++){
if(a[i] > a[i - 1] + k) {
ans++;
if(a[i - 2] + (2 * k) >= a[i]) {
a[i - 1] = a[i - 2] + k;
}
else{
a[i] = a[i - 1] + k;
}
}
}
cout << ans;
}
int32_t main() {
ios_base::sync_with_stdio(false), cin.tie(nullptr);
//freopen("promote.in", "r", stdin);
//freopen("promote.out", "w", stdout);
int T = 1;
//cin >> T;
while(T--) orz();
return 0;
}
