Submission #894625

#	Time	Username	Problem	Language	Result	Execution time	Memory
894625		IWKR	Exhibition (JOI19_ho_t2)	C++17	100 / 100	58 ms	6740 KiB

joi2019_ho_t2

#include <bits/stdc++.h>
using namespace std;

#define int long long
vector<pair<int, int>> v;
vector<int> frames;
int n, m;

bool isOkay(int k) {
	int start = 0;
	for (int i = k; i < m; i++) {
		while (start < n && v[start].second > frames[i]) {
			start++;
		}
		if (start == n) {
			return false;
		} else {
			start++;
		}
	}
	return true;
}
		
int32_t main() {
	ios_base::sync_with_stdio(false);
	cin.tie(NULL);
	cout.tie(NULL);
	cin >> n >> m;
	for (int i = 0; i < n; i++) {
		int a, b;
		cin >> a >> b;
		v.push_back({b, a});
	}
	for (int i = 0; i < m; i++) {
		int c;
		cin >> c;
		frames.push_back(c);
	}
	sort(v.begin(), v.end());
	sort(frames.begin(), frames.end());
	int low = -1;
	int high = m;
	while (high - low > 1) {
		int mid = (high + low) / 2;
		if (isOkay(mid)) {
			high = mid;
		} else {
			low = mid;
		}
	}
	cout << m - high;
}

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