Submission #1216588

#	Time	Username	Problem	Language	Result	Execution time	Memory
1216588		kokoxuya	The short shank; Redemption (BOI21_prison)	C++20	10 / 100	218 ms	33544 KiB

prison

#include <bits/stdc++.h>
using namespace std;
#define int long long
#define pb push_back
#define mp make_pair
#define pii pair<int,int>
#define ss second
#define ff first
#define piii pair<int,pii>
#define debu(x) (cerr << #x  << " = "<< x << "\n")
#define debu2(x,y) (cerr << #x  << " = "<< x << " " << #y << " = " << y << "\n")
#define debu3(x,y,z) (cerr << #x  << " = "<< x << " " << #y << " = " << y << " " << #z << " = " << z<< "\n")
#define bitout(x,y) {\
	cerr << #x << " : ";\
	for (int justforbits = y; justforbits >=0; justforbits--)cout << (((1 << justforbits) & x)>=1);\
	cout << "\n";\
}
#define rangeout(j,rangestart,rangeend) {\
	cerr << "outputting" << #j<< ":\n";\
	for (int forrang = rangestart; forrang <= rangeend; forrang++)cerr << j[forrang] << " ";\
	cerr<<"\n";\
}
#define c1 {cerr << "Checkpoint 1! \n\n";cerr.flush();}
#define c2 {cerr << "Checkpoint 2! \n\n";cerr.flush();}
#define c3 {cerr << "Checkpoint 3! \n\n";cerr.flush();}
#define c4 {cerr << "Checkpoint 4! \n\n";cerr.flush();}


signed main()
{
    int t1,t2,t3,t4;
    mt19937_64 rnd(chrono::high_resolution_clock::now().time_since_epoch().count());
    //ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
	
	int n,d,t;cin>>n>>d>>t;
	
	priority_queue<piii,vector<piii>,greater<piii>>pq;
	for(int a=1;a<=n;a++)
	{
		cin>>t1;
		if(t1<=t)pq.push(mp(a,mp(a+(t-t1),a)));
	}
	
	set<int>curr;
	priority_queue<pii,vector<pii>,greater<pii>>ends;
	vector<int>foreach(n+1,0);
	
	for(int a=1;a<=n;a++)
	{
		while(!pq.empty()&&pq.top().ff<=a)
		{
			curr.insert(pq.top().ss.ss);
			ends.push(pq.top().ss);
			pq.pop();
		}
		while(!ends.empty()&&ends.top().ff<a)
		{
			curr.erase(ends.top().ss);
			ends.pop();
		}
		
		if(!curr.empty())
		{
			foreach[a]=(*prev(curr.end()));
		}
	}
	
	int ans=n,currans=0;
	priority_queue<int>hav;
	for(int a=1;a<=n;a++)
	{
		currans+=(foreach[a]==0?0:1);
	}
	
	for(int a=n;a>=1;a--)
	{
		if(foreach[a]!=0)
		{
			currans--; //is safe now!
			hav.push(foreach[a]); //won't be safe when this guy enters the section too
		}
		
		while(!hav.empty()&&hav.top()>=a)
		{
			hav.pop();
			currans++; //not safe anymore 
		}
		ans=min(ans,currans);
	}
	
	cout<<ans;
}

• Subtask 1: 0 / 15
• Subtask 2: 10 / 10
• Subtask 3: 0 / 20
• Subtask 4: 0 / 10
• Subtask 5: 0 / 25
• Subtask 6: 0 / 20