#include<bits/stdc++.h>
using namespace std;
#define ff first
#define ss second
#define pb push_back
#define int long long
const int N=5005;
vector<int>ans;
int a[N];
int dp[N];
signed main(){
int n,x;
cin>>n>>x;
for(int i=1;i<=n;i++){
cin>>a[i];
}
for(int i=1;i<=n;i++)dp[i]=1e9;
dp[0]=0;
int ans=n;
for(int i=1;i<=n;i++){
for(int j=0;j<i;j++){
if(a[i]-a[j] <=(i-j)*x){
dp[i]=min(dp[i],dp[j]+i-j-1);
}
}
ans=min(ans,n-i+dp[i]);
}
cout<<ans;
}
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