This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef pair <int,int> ii;
typedef pair <int,ii> iii;
typedef pair <int,iii> iiii;
//#define int ll
#define F first
#define S second
#define pb push_back
#define mp make_pair
bool BIT(int u,int v) {return (u&(1<<v));}
int gen(int l,int r)
{
return l+(rand()%(r-l+1));
}
vector<int> rar;
int st[1600055][2];
int a[200005];
int x;
int n;
void upd(int id,int l,int r,int u,int t,int val)
{
if (l==r) {st[id][t]=max(st[id][t],val);return;}
int mid=(l+r)/2;
if (mid>=u) upd(id*2,l,mid,u,t,val);
else upd(id*2+1,mid+1,r,u,t,val);
st[id][t]=max(st[id*2][t],st[id*2+1][t]);
}
int get(int id,int l,int r,int u,int v,int t)
{
if (u>v) return 0;
if (l>v||r<u) return 0;
if (u<=l&&r<=v) return st[id][t];
int mid=(l+r)/2;
int g1=get(id*2,l,mid,u,v,t);
int g2=get(id*2+1,mid+1,r,u,v,t);
return max(g1,g2);
// return max(get(id*2,l,mid,u,v,t),get(id*2+1,mid+1,r,u,v,t));
}
int32_t main()
{
ios_base::sync_with_stdio(0);
cin.tie(0);
cout.tie(0);
srand(time(NULL));
// freopen("DAYDEP.inp","r",stdin);
// freopen("DAYDEP.out","w",stdout);
cin>>n>>x;
for(int i=1;i<=n;i++) cin>>a[i],rar.pb(a[i]),rar.pb(a[i]-x);
sort(rar.begin(),rar.end());
int res=0;
for(int i=1;i<=n;i++)
{
int id=lower_bound(rar.begin(),rar.end(),a[i]-x)-rar.begin()+1;
int dp0=1+get(1,1,2*n,1,id-1,0);
res=max(res,dp0);
int id1=lower_bound(rar.begin(),rar.end(),a[i])-rar.begin()+1;
int dp1=1+max(get(1,1,2*n,1,id1-1,1),get(1,1,2*n,1,id1-1,0));
res=max(res,dp1);
upd(1,1,2*n,id1,1,dp1);
upd(1,1,2*n,id,0,dp0);
}
cout<<res;
}
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