// +-- -- --++-- +-In the name of ALLAH-+ --++-- -- --+ //
#include <bits/stdc++.h>
#define fast ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0)
#define endl '\n'
#define ll long long
#define int long long
#define all(x) x.begin(), x.end()
#define all1(x) x.rbegin(), x.rend()
#define seea(x) for(int i = 0; i < x; i++)
#define pb push_back
#define ff first
#define vc vector
#define ss second
using namespace std;
const int mod = 1e9 + 7;
const int MOD = 998244353;
int lnds(vector<int>a){
vector<int>dp;
for(int i = 0; i < a.size(); i ++){
auto id = upper_bound(dp.begin(), dp.end(), a[i]);
if(id == dp.end()){
dp.push_back(a[i]);
}
else dp[id - dp.begin()] = a[i];
}
return dp.size();
}
void solve(){
int n, mx; cin >> n >> mx;
vector<int>a(n);
seea(n)cin >> a[i];
vector<int>nw;
for(int i = 1; i <= n; i ++){
if(i * mx >= a[i - 1]){
nw.push_back(i * mx - a[i - 1]);
}
}
cout << n - lnds(nw);
}
signed main(){
fast;
int t = 1;
//cin >> t;
while (t --) solve();
}
