Submission #710306

#	Time	Username	Problem	Language	Result	Execution time	Memory
710306		ld_minh4354	Money (IZhO17_money)	C++17	100 / 100	1455 ms	112144 KiB

money

#include<bits/stdc++.h>
#include<ext/pb_ds/assoc_container.hpp>
#include<ext/pb_ds/tree_policy.hpp>
using namespace std;
using namespace __gnu_pbds;
typedef tree<long long, null_type, less<long long>, rb_tree_tag, tree_order_statistics_node_update> ordered_set;
 
#define int long long
#define fi first
#define se second
#define pb push_back
#define debug(x) cout<<#x<<": "<<x<<"\n"
 
bool comp(vector<int> v1, vector<int> v2)
{
	return v1[0]<v2[0];
}
 
signed main()
{
	ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0);
//	freopen("input.000","r",stdin);
//	freopen("output.000","w",stdout);
//	srand((unsigned)time(NULL));
//	rand()
	
	int n,i,a[1000005],ans,m,r,pos;
	vector<int> v[1000005];
	ordered_set s;
	
	cin>>n;a[0]=0;
	for (i=1;i<n+1;i++) cin>>a[i];
	
	m=1;
	for (i=1;i<n+1;i++)
	{
		if (a[i-1]>a[i]) m++;
		v[m].pb(a[i]);
	}
//	sort(v+1,v+m+1,comp);
	
//	for (i=1;i<m+1;i++)
//	{
//		cout<<i<<": ";
//		for (auto val:v[i]) cout<<val<<" ";
//		cout<<"\n";
//	}
	
	ans=m;
	s.insert(0);s.insert(1e7);
	for (i=1;i<m+1;i++)
	{
		pos=s.order_of_key(v[i][0]+1);
		r=*s.find_by_order(pos);
		
		for (auto val:v[i]) if (val>r)
		{
			ans++;
			pos=s.order_of_key(val+1);
			r=*s.find_by_order(pos);
		}
		
		for (auto val:v[i]) s.insert(val);
	}
	
	cout<<ans;
}
 

• Subtask 1: 9 / 9
• Subtask 2: 16 / 16
• Subtask 3: 20 / 20
• Subtask 4: 55 / 55