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 int long long
#define matsuri pair<int,int>
//const int iris = 1e9+7;
const int iris = 998244353;
using namespace std;
const int N=3e5;
struct sagiri
{
vector<int> st;
sagiri()
{
st.resize(N*4, 0);
}
void mdf(int i,int l,int r,int p,int x)
{
int m=l+(r-l)/2;
if(l==r)
{
st[i]=x;
return;
}
if(p<=m)
mdf(i*2,l,m,p,x);
else
mdf(i*2+1,m+1,r,p,x);
st[i]=max(st[i*2], st[i*2+1]);
}
int qry(int i,int l,int r,int L,int R)
{
int m=l+(r-l)/2;
if(L<=l && r<=R)
return st[i];
else if(R<=m)
return qry(i*2,l,m,L,R);
else if(L>m)
return qry(i*2+1,m+1,r,L,R);
else
return max(qry(i*2,l,m,L,r), qry(i*2+1,m+1,r,L,R) );
}
}dis, dp;
void solve()
{
int n,d;
cin>>n>>d;
vector<matsuri> arr;
for(int i=1;i<=n;i++)
{
int a;
cin>>a;
arr.emplace_back(a,-i);
}
sort(arr.begin(), arr.end());
set<int> s;
dp.mdf(1,0,n,0,0);
s.insert(0);
dis.mdf(1,0,n,0,n);
for(auto [a,i]:arr)
{
i*=-1;
s.insert(i);
auto it=s.find(i);
it--;
dis.mdf(1,0,n,*it,i-*it);
int l=0, r=i;
//cout<<i<<' '<<a<<'\n';
while(l<r)
{
int m=l+(r-l)/2;
//cout<<" - "<<m<<' '<<dis.qry(1,0,n,m,i)<<'\n';
//for(int j=m;j<=i;j++)
// cout<<" "<<dis.qry(1,0,n,j,j)<<'\n';
if(dis.qry(1,0,n,m,i)<=d)
r=m;
else
l=m+1;
}
it=upper_bound(s.begin(), s.end(), a);
if(it==s.end())
dis.mdf(1,0,n,i,n-i);
else
dis.mdf(1,0,n,i,*it-i);
//cout<<' '<<l<<' '<<i<<' '<<dp.qry(1,0,n,l,i)<<'\n';
dp.mdf(1,0,n,i,dp.qry(1,0,n,l,i)+1);
}
cout<<dp.qry(1,0,n,0,n)<<'\n';
}
signed main()
{
ios::sync_with_stdio(0);
cin.tie(0);
int T=1;
//cin>>T;
while(T--)
solve();
return 0;
}
Compilation message (stderr)
Main.cpp: In function 'void solve()':
Main.cpp:63:11: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
63 | for(auto [a,i]:arr)
| ^
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