Submission #671631

#	Time	Username	Problem	Language	Result	Execution time	Memory
671631		PoPularPlusPlus	Financial Report (JOI21_financial)	C++17	100 / 100	676 ms	39172 KiB

Main

#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define ull unsigned long long 
#define pb(e) push_back(e)
#define sv(a) sort(a.begin(),a.end())
#define sa(a,n) sort(a,a+n)
#define mp(a,b) make_pair(a,b)
#define vf first
#define vs second
#define ar array
#define all(x) x.begin(),x.end()
const int inf = 0x3f3f3f3f;
const int mod = 1000000007; 
const double PI=3.14159265358979323846264338327950288419716939937510582097494459230;
bool remender(ll a , ll b){return a%b;}
 
//freopen("problemname.in", "r", stdin);
//freopen("problemname.out", "w", stdout);
 
struct Seg {
	int siz;
	vector<int> v;
	
	void init(int n){
		siz = 1;
		while(siz < n)siz*=2;
		siz*=2;
		
		v.assign(siz * 2 , 0);
	}
	
	void set(int i , int val , int x , int lx , int rx){
		if(rx - lx == 1){
			v[x] = val;
			return;
		}
		int m = (lx + rx)/2;
		if(i < m)set(i , val , 2 *x + 1 , lx , m);
		else set(i , val , 2 * x + 2 , m , rx);
		v[x] = max(v[2 * x + 1] , v[2 * x + 2]);
	}
	
	void set(int i , int val){
		set(i , val , 0 , 0 , siz);
	}
	
	int mx(int l , int r , int x , int lx , int rx){
		if(r <= lx || rx <= l)return 0;
		if(lx >= l && rx <= r)return v[x];
		int m = (lx + rx)/2;
		return max(mx(l , r , 2 * x+ 1 , lx , m) , mx(l , r , 2 * x + 2 , m , rx));
	}
	
	int mx(int l , int r){
		return mx(l , r , 0 , 0 , siz);
	}
};
 
void solve(){
	int n;
	cin >> n;
	int d;
	cin >> d;
	int arr[n];
	for(int i = 0; i < n; i++)cin >> arr[i];
	map<int,int> m;
	for(int i = 0; i < n; i++){
		m[arr[i]]++;
	}
	int cur = 0;
	for(auto it : m){
		m[it.vf] = cur;
		cur++;
	}
	for(int i = 0; i < n; i++){
		arr[i] = m[arr[i]];
	}
	set<pair<int,int>> s;
	int dp[n];
	Seg st;
	st.init(n + 5);
	for(int i = 0; i < n; i++){
		while(s.size() > 0){
			int p = (*s.begin()).vs;
			p *= -1;
			if(p < i - d){
				st.set(arr[p] , 0);
				s.erase(s.begin());
			}
			else break;
		}
		int mx = 0;
		if(s.size() == 0){
			dp[i] = 1;
			st.mx(arr[i],arr[i]+1);
			if(dp[i] > mx)st.set(arr[i] , dp[i]);
		}
		else {
			dp[i] = st.mx(0 , arr[i]) + 1;
			mx = st.mx(arr[i],arr[i]+1);
			if(dp[i] > mx)st.set(arr[i] , dp[i]);
			/*auto it = s.end();
			it--;
			pair<int,int> p = *it;
			if(arr1[-p.vs] >= arr[i]){
				mx = max(mx , p.vf);
				arr1[i]=arr1[-p.vs];
			}*/
		}
		s.insert(mp(arr[i],-i));
	}
	cout << st.mx(arr[n-1],n + 1) << '\n';
}
 
int main(){
ios_base::sync_with_stdio(false);
cin.tie(NULL);
	//int t;cin >> t;while(t--)
	solve();
	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