#include <iostream>
#include <algorithm>
using namespace std;
int main() {
int n;
cin>>n;
int a[n];
for(int i=0;i<n;i++){
cin>>a[i];
}
int k;
cin>>k;
int count=1,mini=a[0];
sort(a,a+n);
for(int i=1;i<n;i++){
if(a[i]-mini > k){
mini=a[i];
count++;
}
}
cout<<count<<"\n";
return 0;
}
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