Submission #234921

#	Time	Username	Problem	Language	Result	Execution time	Memory
234921		davitmarg	Exhibition (JOI19_ho_t2)	C++17	0 / 100	5 ms	384 KiB

joi2019_ho_t2

/*DavitMarg*/
#include <iostream>
#include <algorithm>
#include <cmath>
#include <vector>
#include <string>
#include <cstring>
#include <map>
#include <unordered_map>
#include <set>
#include <queue>
#include <iomanip>
#include <bitset>
#include <stack>
#include <cassert>
#include <iterator>
#include <fstream>
#define mod 1000000007ll
#define LL long long
#define LD long double
#define MP make_pair
#define PB push_back
#define all(v) v.begin(), v.end()
#define fastIO ios::sync_with_stdio(false); cin.tie(0)
using namespace std;

const int N = 100005;

int n,k,c[N];
pair<int, int> a[N];

bool check(int x)
{
	multiset<int> s;
	for (int i = 1; i <= k; i++)
		s.insert(c[i]);

	vector<pair<int,int>> b;

	for (int i = 1; i <= x; i++)
		b.push_back(a[i]);

	sort(all(b), [](pair<int, int> a, pair<int, int> b) {
		if (a.second != b.second)
			return a.second < b.second;
		return a < b;
	});

	for (int i = 0; i < x; i++)
	{
		if (i)
			b[i].first = max(b[i].first, b[i - 1].first);
		auto it = s.lower_bound(b[i].first);
		if (it == s.end())
			return 0;
		s.erase(it);
	}
	return 1;
}

int main()
{
	fastIO;
	cin >> n >> k;
	for (int i = 1; i <= n; i++)
		cin >> a[i].first >> a[i].second;
	for (int i = 1; i <= k; i++)
		cin >> c[i];
	sort(a + 1, a + 1 + n);
	int l = 0, r = k, m, ans = 0;
	while (l <= r)
	{
		m = (l + r) / 2;
		if (check(m))
		{
			ans = m;
			l = m + 1;
		}
		else
			r = m - 1;
	}
	cout << ans << endl;
	return 0;
}

/*



*/

• Subtask 1: 0 / 10
• Subtask 2: 0 / 40
• Subtask 3: 0 / 50