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;
long long k,c,d,x,y,z,n,kq,kq1;
int i,j;
long long ans[1000001],b[1000001],st[1000001];
struct gv
{
long long val,vitri;
};
gv a[1000001];
bool cmp(gv x,gv y)
{
if (x.val<y.val) return true;
if (x.val==y.val && x.vitri>y.vitri) return true;
return false;
}
void buildtree(int id,int l,int r)
{
if (l==r)
{
st[id]=0; return;
}
int mid=(l+r)/2;
buildtree(id*2,l,mid);
buildtree(id*2+1,mid+1,r);
st[id]=st[id*2]+st[id*2+1];
}
void update(int id,int l,int r,int i,int val)
{
if (i<l || r<i) return;
if (l==r)
{
st[id]=val;
return;
}
int mid=(l+r)/2;
update(id*2,l,mid,i,val);
update(id*2+1,mid+1,r,i,val);
st[id]=max(st[id*2],st[id*2+1]);
}
long long get(int id,int l,int r,int u,int v)
{
if (v<l || r<u) return 0;
if (u<=l && r<=v) return st[id];
int mid=(l+r)/2;
return max(get(id*2,l,mid,u,v),get(id*2+1,mid+1,r,u,v));
}
void solve()
{
buildtree(1,1,n); kq=0;
sort(a+1,a+n+1,cmp);
for (int i=1;i<=n;i++)
{
c=get(1,1,n,1,a[i].vitri)+1;
ans[a[i].vitri]=c;
update(1,1,n,a[i].vitri,c);
}
for (int i=1;i<=n;i++)
kq=max(kq,ans[i]);
//cout<<kq<<"\n";
kq1=max(kq1,kq);
}
void sub1()
{
for (int i=1;i<=n;i++)
{
for (int j=1;j<i;j++)
{
a[j].val=b[j]; a[j].vitri=j;
}
for (int j=i;j<=n;j++)
{
a[j].val=b[j]+k; a[j].vitri=j;
}
solve();
}
cout<<kq1;
}
void sub2()
{
for (int i=1;i<=n;i++)
{
a[i].val=b[i]; a[i].vitri=i;
}
sort(a+1,a+n+1,cmp);
for (int i=1;i<=n;i++)
{
c=get(1,1,n,1,a[i].vitri)+1;
ans[a[i].vitri]=c;
update(1,1,n,a[i].vitri,c);
}
for (int i=1;i<=n;i++)
kq=max(kq,ans[i]);
cout<<kq;
}
int main()
{
//freopen("daydep.inp", "r" ,stdin);
//freopen("daydep.out", "w" ,stdout);
ios_base::sync_with_stdio(0);
cin.tie(0); cout.tie(0);
cin>>n>>k;
for (int i=1;i<=n;i++)
{
cin>>b[i];
}
if (k!=0) sub1(); else
sub2();
}
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