#include<bits/stdc++.h>
#define int long long
#define fi first
#define se second
using namespace std;
int const N = 2e5 + 3, MOD = 1e9 + 7;
int n, m, a[N];
signed main() {
cin.tie(0)->sync_with_stdio(0);
cin >> n >> m;
for(int i = 1; i <= n; i++) cin >> a[i];
int cnt = 0;
int pre = 0;
for (int i = 1; i <= n; ++i) {
if (a[i] - pre > m) {
cnt++;
pre = pre + m;
} else pre = a[i];
}
cout << cnt;
}
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