Submission #902879

#	Time	Username	Problem	Language	Result	Execution time	Memory
902879		LCJLY	Financial Report (JOI21_financial)	C++14	0 / 100	197 ms	24780 KiB

Main

#include <bits/stdc++.h>
using namespace std;
 
//#define int long long
#define ld long double
#define show(x,y) cout << y << " " << #x << endl;
#define show2(x,y,i,j) cout << y << " " << #x << "  " << j << " " << #i << endl;
#define show3(x,y,i,j,p,q) cout << y << " " << #x << "  " << j << " " << #i << "  " << q << " " << #p << endl; 
#define show4(x,y) for(auto it:x) cout << it << " "; cout << #y << endl;
typedef pair<long long,long long>pii;

inline int combine(int a, int b){
	return max(a,b);
}

struct node{
	int s,e,m;
	node *l,*r;
	int v;
	
	node(int ss, int ee):s(ss),e(ee),m((s+e)>>1),l(NULL),r(NULL),v(0){
	}
	
	inline void inst(){
		if(l==NULL)l=new node(s,m);
		if(r==NULL)r=new node(m+1,e);
	}
	
	void upd(int x, int y){
		if(s==e){
			v=y;
			return;
		}
		inst();
		if(x<=m) l->upd(x,y);
		else r->upd(x,y);
		v=combine(l->v,r->v);
	}
	
	int query(int x, int y){
		if(x<=s&&y>=e){
			return v;
		}
		inst();
		if(y<=m)return l->query(x,y);
		if(x>m)return r->query(x,y);
		return combine(l->query(x,m),r->query(m+1,y));
	}
};

void solve(){	
	int n,k;
	cin >> n >> k;
	
	int maxn=1000000005;
	node st(0,maxn);
	int arr[n];
	map<int,int>last;
	for(int x=0;x<n;x++){
		cin >> arr[x];
		arr[x]++;
		last[arr[x]]=-1;
	}
	
	int dp[n];
	
	set<pii>se;
	for(int x=0;x<n;x++){
		//remove
		while(!se.empty()){
			if(se.begin()->first<x-k){
				pii hold=*se.begin();
				se.erase(se.begin());
				st.upd(hold.second,0);
				last[hold.second]=-1;
			}
			else break;
		}
		
		int l=st.query(0,arr[x]-1)+1;
		int r=st.query(arr[x],maxn);
		dp[x]=max(l,r);
		if(l>=r){
			st.upd(arr[x],l);
		}
		if(last[arr[x]]!=-1){
			int index=last[arr[x]];
			se.erase(se.find({index,dp[index]}));
			last[arr[x]]=x;
		}
		se.insert({x,arr[x]});
	}
	
	cout << dp[n-1];
}	
 
int32_t main(){										
	ios::sync_with_stdio(0);	
	cin.tie(0);
	int t=1;
	//cin >> t;
	while(t--){
		solve();
	}
}

• Subtask 1: 0 / 14
• Subtask 2: 0 / 14
• Subtask 3: 0 / 20
• Subtask 4: 0 / 12
• Subtask 5: 0 / 5
• Subtask 6: 0 / 35