Submission #104116

#	Time	Username	Problem	Language	Result	Execution time	Memory
104116		faustaadp	medians (balkan11_medians)	C++17	0 / 100	119 ms	14840 KiB

medians

#include <bits/stdc++.h>
#define pb push_back
#define mp make_pair
#define fi first
#define se second
typedef long long ll;
using namespace std;
ll n,i,a[202020],b[202020],sud[202020],jaw[202020],j;
set<ll> st;
int main()
{
	ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL);
	cin>>n;
	for(i=1;i<=n;i++)cin>>a[i];
	for(i=1;i<n;i++)b[a[i]]++;
	for(i=1;i<=n*2-1;i++)
		if(b[i]==0)
			st.insert(i);
	jaw[1]=a[1];
	for(i=n-1;i>=1;i--)
	{
		if(a[i]>a[i+1])
		{
			j=*st.upper_bound(a[i]);
			sud[j]=1;
			jaw[i*2]=j;
			st.erase(j);
			j=*st.upper_bound(a[i]);
			sud[j]=1;
			jaw[i*2+1]=j;
			st.erase(j);
		}
		else
		if(a[i]<a[i+1])
		{
			j=*st.lower_bound(a[i]);
			sud[j]=1;
			jaw[i*2]=j;
			st.erase(j);
			j=*st.lower_bound(a[i]);
			sud[j]=1;
			jaw[i*2+1]=j;
			st.erase(j);
		}
		else
		{
			j=*st.lower_bound(a[i]);
			sud[j]=1;
			jaw[i*2]=j;
			st.erase(j);
			j=*st.upper_bound(a[i]);
			sud[j]=1;
			jaw[i*2+1]=j;
			st.erase(j);
		}	
		b[a[i]]--;
		if(b[a[i]]==0&&sud[a[i]]==0)st.insert(a[i]);
	}
	for(i=1;i<=(n*2-1);i++)
		if(i<(n*2-1))
			cout<<jaw[i]<<" ";
		else
			cout<<jaw[i]<<"\n";
}

• Subtask 1: 0 / 65
• Subtask 2: 0 / 35