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>
#define getbit(i, j) ((i >> j) & 1)
#define maxn 300005
#define name "main"
using namespace std;
mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count());
long long GetRandom(long long l, long long r)
{
return uniform_int_distribution<long long> (l, r)(rng);
}
int n,d,a[maxn],st[maxn*4],dp[maxn],dem[maxn],sl,res,lazy[maxn*4],mod=-1e9;
pair<int,int> b[maxn],tt[maxn*4];
void build(int id,int l,int r)
{
if(l>r) return;
if(l==r)
{
st[id]=mod;
tt[id]={1e9,0};
return;
}
int mid=(l+r)/2;
build(id*2,l,mid);
build(id*2+1,mid+1,r);
st[id]=-1e9;
tt[id]={1e9,0};
}
void updatest(int id,int l,int r,int vt,int val)
{
if(l>vt||r<vt) return;
if(l==r)
{
st[id]=max(st[id],val);
if(val==0) st[id]=0;
return;
}
int mid=(l+r)/2;
updatest(id*2,l,mid,vt,val);
updatest(id*2+1,mid+1,r,vt,val);
st[id]=max(st[id*2],st[id*2+1]);
}
int get(int id,int l,int r,int d,int c)
{
if(l>c||r<d) return 0;
if(l>=d&&r<=c) return st[id];
int mid=(l+r)/2;
return max(get(id*2,l,mid,d,c),get(id*2+1,mid+1,r,d,c));
}
void lazy1(int id)
{
int val=lazy[id];
lazy[id]=0;
lazy[id*2]=max(lazy[id*2],val);
lazy[id*2+1]=max(lazy[id*2+1],val);
if(tt[id*2].first!=1e9) tt[id*2].first=max(tt[id*2].first,val);
if(tt[id*2+1].first!=1e9) tt[id*2+1].first=max(tt[id*2+1].first,val);
}
void updatett(int id,int l,int r,int d,int c,int val)
{
if(l>c||r<d) return;
if(l>=d&&r<=c)
{
if(val==0)
{
tt[id].first=1e9;
tt[id].second=0;
return;
}
else if(d==c)
{
tt[id].first=val;
tt[id].second=l;
return;
}
else
{
if(tt[id].first==1e9) return;
tt[id].first=max(tt[id].first,val);
lazy[id]=max(lazy[id],val);
return;
}
}
int mid=(l+r)/2;
lazy1(id);
updatett(id*2,l,mid,d,c,val);
updatett(id*2+1,mid+1,r,d,c,val);
tt[id]=tt[id*2];
if(tt[id].first>tt[id*2+1].first) tt[id]=tt[id*2+1];
}
signed main()
{
ios_base::sync_with_stdio(false);
cin.tie(NULL);
cout.tie(NULL);
// if(fopen(name".inp","r"))
// {
// freopen(name".inp","r",stdin);
// freopen(name".out","w",stdout);
// }
cin >> n >> d;
for(int i=1;i<=n;i++)
{
cin >> a[i];
b[i]={a[i],i};
}
sort(b+1,b+n+1);
sl=1;
a[b[1].second]=sl;
for(int i=2;i<=n;i++)
{
if(b[i].first>b[i-1].first) sl++;
a[b[i].second]=sl;
}
build(1,1,sl);
for(int i=1;i<=n;i++)
{
while(i-tt[1].first>d)
{
int val=tt[1].second;
// cout<<val<<' '<<tt[1].first<<' '<<i<<'\n';;
updatest(1,1,sl,val,0);
updatett(1,1,sl,val,val,0);
}
dp[i]=max(1,get(1,1,sl,1,a[i]-1)+1);
updatest(1,1,sl,a[i],dp[i]);
updatett(1,1,sl,a[i],a[i],i);
updatett(1,1,sl,a[i]+1,sl,i);
res=max(res,dp[i]);
}
cout<<res;
}
# | Verdict | Execution time | Memory | Grader output |
---|
Fetching results... |
# | Verdict | Execution time | Memory | Grader output |
---|
Fetching results... |
# | Verdict | Execution time | Memory | Grader output |
---|
Fetching results... |
# | Verdict | Execution time | Memory | Grader output |
---|
Fetching results... |
# | Verdict | Execution time | Memory | Grader output |
---|
Fetching results... |
# | Verdict | Execution time | Memory | Grader output |
---|
Fetching results... |