#include <bits/stdc++.h>
#define Hoshimachi signed
#define Suisei main
using namespace std;
#define int long long
const int N=1e6+5;
int n,k,a[N];
bool used[N];
void sub12(){
    int total=0,saved=0;
    for(int i=1; i<=n; i++){
        total+=a[i];
    }
    sort(a+1,a+1+n);
    for(int j=1; j<=n; j++){
        for(int i=j-1; i>=1; i--){
            if(!used[i] && a[j]-a[i]>=k){
                used[i]=1;
                saved+=a[i];
                break;
            }
        }
    }
    cout<<total-saved;
}
void sub3(){
    sort(a+1,a+1+n,greater<int>());
    int ans=0;
    multiset<int> ms;
    for(int i=1; i<=n; i++){
        auto it=ms.lower_bound(a[i]+k);
        if(it==ms.end()){
            ans+=a[i];
        }
        else{
            ms.erase(it);
        }
        ms.insert(a[i]);
    }
    cout<<ans; 
}
Hoshimachi Suisei(){
    ios_base::sync_with_stdio(0);
    cin.tie(0); cout.tie(0);
    freopen("CHIAHANG.inp","r",stdin);
    freopen("CHIAHANG.out","w",stdout);
    cin>>n>>k;
    for(int i=1; i<=n; i++){
        cin>>a[i];
    }
    if(n<=1e4) sub12();
    else sub3();
}