#include <bits/stdc++.h>
#define int long long
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) {
if(A[i - 2] + (2 * K) < A[i]) {
A[i] = A[i - 1] + K;
}
else{
A[i - 1] = A[i] - K;
}
ans++;
}
}
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;
}
