Submission #1031689

#	Time	Username	Problem	Language	Result	Execution time	Memory
1031689		juicy	Exhibition (JOI19_ho_t2)	C++17	0 / 100	1 ms	348 KiB

joi2019_ho_t2

#include <bits/stdc++.h>

using namespace std;

#ifdef LOCAL
#include "debug.h"
#else
#define debug(...) 42
#endif

const int N = 1e5 + 5;

int n, m, sz;
int c[N];
array<int, 2> a[N], s[N];

void upd(int i, array<int, 2> x) {
	for (; i <= sz; i += i & -i) {
		s[i] = max(s[i], x);
	}
}

array<int, 2> qry(int i) {
	array<int, 2> res{};
	for (; i; i -= i & -i) {
		res = max(res, s[i]);
	}
	return res;
}

int main() {
	ios::sync_with_stdio(false); cin.tie(nullptr);

	cin >> n >> m;
	vector<int> comp;
	for (int i = 1; i <= n; ++i) {
		cin >> a[i][0] >> a[i][1];
		comp.push_back(a[i][1]);
	}
	for (int i = 1; i <= m; ++i) {
		cin >> c[i];
	}
	sort(a + 1, a + n + 1);
	sort(c + 1, c + m + 1);
	sort(comp.begin(), comp.end());
	comp.erase(unique(comp.begin(), comp.end()), comp.end());
	sz = comp.size();
	for (int i = 1; i <= n; ++i) {
		a[i][1] = lower_bound(comp.begin(), comp.end(), a[i][1]) - comp.begin() + 1;
	}
	int ans = 0;
	for (int i = 1, p = 0; i <= n; ++i) {
		while (p <= m && c[p] < a[i][0]) {
			++p;
		}
		auto res = qry(a[i][1]);
		int nxt = max(1 - res[1], p);
		if (nxt <= m) {
			ans = max(ans, res[0] + 1);
			upd(a[i][1], {res[0] + 1, -nxt});
		}
	}
	cout << ans;
	return 0;
}

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