Submission #533944

#	Time	Username	Problem	Language	Result	Execution time	Memory
533944		michao	Financial Report (JOI21_financial)	C++14	100 / 100	440 ms	34000 KiB

Main

#include <bits/stdc++.h>
#define int long long
#define mp make_pair
#define pb push_back
#define ld long double
#define pii pair<int,int>
#define sz(x) (int)x.size()
#define piii pair<pii,pii>
#define precise cout<<fixed<<setprecision(10)
#define st first
#define nd second
#define ins insert
#define vi vector<int>
#define BOOST ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0)
using namespace std;
const int MAX=3e5+5;
const int inf=(int)1e18+9;
int t[MAX*2];
int a[MAX];
int p[MAX];
int minid[MAX];
void update(int u,int c){
	for (t[u+=MAX]=c;u>1;u>>=1)t[u>>1]=max(t[u],t[u^1]);
}

int query(int u,int v){
	int maxi=0;
	for (u+=MAX,v+=MAX+1;u<v;u>>=1,v>>=1){
		if (u&1)maxi=max(maxi,t[u++]);
		if (v&1)maxi=max(maxi,t[--v]);
	}
	return maxi;
}

bool cmp(pii a,pii b){
	if (a.st!=b.st)return a.st<b.st;
	return a.nd>b.nd;
}

set<int>checked;

int Find(int u){
	if (p[u]!=u)p[u]=Find(p[u]);
	return p[u];
}

void Union(int u,int v){
	minid[Find(v)]=min(minid[Find(v)],minid[Find(u)]);
	p[Find(u)]=Find(v);
}
int32_t main(){
  BOOST;
  int n,d;
  cin>>n>>d;
  vector<pii>pom;
  for (int i=1;i<=n;i++){
		cin>>a[i];
		pom.pb(mp(a[i],i));
  }
  
  for (int i=1;i<=n;i++)p[i]=i,minid[i]=i;
  checked.ins(-1);
  checked.ins(n+1);
  int ans=0;
  sort(pom.begin(),pom.end(),cmp);
  for (auto iter:pom){
		int id=iter.nd;
		auto it=*(--checked.lower_bound(id));
		if (it!=-1 && id-it<=d)Union(id,it);
		it=*checked.upper_bound(id);
		if (it!=n+1 && it-id<=d)Union(id,it);
		int l=minid[Find(id)];
		int r=id;
		int dpek=query(l,r)+1;
		update(id,dpek);
		ans=max(ans,dpek);
		checked.ins(id);
  }
  cout<<ans;
  return 0; 
}

• Subtask 1: 14 / 14
• Subtask 2: 14 / 14
• Subtask 3: 20 / 20
• Subtask 4: 12 / 12
• Subtask 5: 5 / 5
• Subtask 6: 35 / 35