Submission #802137

#	Time	Username	Problem	Language	Result	Execution time	Memory
802137		starchan	Advertisement 2 (JOI23_ho_t2)	C++17	100 / 100	248 ms	45652 KiB

Main

#include<bits/stdc++.h>
using namespace std;
#define int long long
#define in pair<int, int>
#define f first
#define s second
#define pb push_back
#define pob pop_back
#define INF (int)1e17
#define MX (int)3e5+5
#define fast() ios_base::sync_with_stdio(false); cin.tie(NULL)
struct janitor
{
	set<in> ok;
	void add(in zz)
	{
		auto it1 = ok.lower_bound({zz.f, -INF});
		if(it1 == ok.end())
		{
			ok.insert(zz);
			return;
		}
		if((*it1).s >= zz.s)
			return;
		ok.insert(zz);
		return;
	}
	int size()
	{
		return ok.size();
	}
};
signed main()
{
	fast();
	int n;
	cin >> n;
	vector<in> ex(n+1);
	ex[0] = {INF, INF};
	for(int i = 1; i <= n; i++)
	{
		cin >> ex[i].s >> ex[i].f;
	}
	sort(ex.rbegin(), ex.rend());
	janitor work;
	for(int i = 1; i <= n; i++)
		work.add({ex[i].f+ex[i].s, ex[i].f-ex[i].s});
	cout << work.size() << "\n";
	return 0;
}	

• Subtask 1: 10 / 10
• Subtask 2: 23 / 23
• Subtask 3: 36 / 36
• Subtask 4: 31 / 31