Submission #927237

#	Time	Username	Problem	Language	Result	Execution time	Memory
927237		Gromp15	Exhibition (JOI19_ho_t2)	C++17	0 / 100	1 ms	348 KiB

joi2019_ho_t2

#include <bits/stdc++.h>
#define ll long long
#define ar array
#define db double
#define all(x) x.begin(), x.end()
#define sz(x) (int)x.size()
using namespace std;
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
#define rint(l, r) uniform_int_distribution<int>(l, r)(rng)
template<typename T> bool ckmin(T &a, const T &b) { return a > b ? a = b, 1 : 0; }
template<typename T> bool ckmax(T &a, const T &b) { return a < b ? a = b, 1 : 0; }
void test_case() {
	int n, m;
	cin >> n >> m;
	vector<int> X, Y;
	vector<ar<int, 2>> a(n);
	for (auto &x : a) cin >> x[0] >> x[1], X.push_back(x[0]), Y.push_back(x[1]);
	vector<int> s(m);
	for (int &x : s) cin >> x, X.push_back(x);
	sort(all(X));
	sort(all(Y));
	X.erase(unique(all(X)), X.end());
	Y.erase(unique(all(Y)), Y.end());
	for (auto &x : a) {
		x[0] = lower_bound(all(X), x[0]) - X.begin();
		x[1] = lower_bound(all(Y), x[1]) - Y.begin();
	}
	for (int &x : s) {
		x = lower_bound(all(X), x) - X.begin();
	}
	sort(all(a));
	sort(all(s));
	int ans = 0;
	for (int mask = 0; mask < 1 << n; mask++) {
		vector<ar<int, 2>> cur;
		for (int i = 0; i < n; i++) if (mask >> i & 1) cur.push_back(a[i]);
		bool ok = 1;
		for (int i = 1; i < sz(cur); i++) {
			if (cur[i][0] < cur[i-1][0] || cur[i][1] < cur[i-1][1]) {
				ok = 0;
				break;
			}
		}
		if (ok) {
			for (int i = 0; i < sz(cur); i++) {
				int cnt = 0;
				for (int x : s) cnt += x >= cur[i][0];
				if (cnt < sz(cur) - i) {
					ok = 0;
					break;
				}
			}
			if (ok) ckmax(ans, sz(cur));
		}
	}
	cout << ans << '\n';


}
int main() {
    cin.tie(0)->sync_with_stdio(0);
    int t = 1;
//    cin >> t;
    while (t--) test_case();
}

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