#include<bits/stdc++.h> #define ll long long #define vll vector<ll> using namespace std; int main(){ int n; ll m; cin >> n >> m; vll poles(n); for (int i = 0; i < n; i++) cin >> poles[i]; ll prev = 0; int ans = 0; for (ll curr : poles){ if (curr < prev) prev = curr; else { if (curr - prev > m) ans++, prev = prev + m; else prev = curr; } } cout << ans << endl; }