Submission #697998

#	Time	Username	Problem	Language	Result	Execution time	Memory
697998		cpLover22	Exhibition (JOI19_ho_t2)	C++17	50 / 100	28 ms	8256 KiB

joi2019_ho_t2

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

using ll = long long;
typedef pair<int, int> pii;
#define fi first
#define se second 

const int N = 1e5 + 5;

int n, m;
pii a[N]; int c[N];

namespace sub2 {
	const int N = 1e3 + 5;
	ll dp[N][N];
	
	void sol() {
		sort(a + 1, a + n + 1, [&](auto &x, auto &y) {
			if (x.se == y.se) return x.fi < y.fi;
			return x.se < y.se;
		});
		sort(c + 1, c + m + 1);
		
		for (int i = 1; i <= n; ++i)
			for (int j = 1; j <= m; ++j) {
				dp[i][j] = max(dp[i-1][j], dp[i][j-1]);
				if (a[i].fi <= c[j]) 
					dp[i][j] = max(dp[i][j], dp[i-1][j-1] + 1);
			}
		cout << dp[n][m];
	}
}

namespace sub3 {
	void sol() {
		
	}
}

signed main() {
	cin.tie(0)->sync_with_stdio(0);
	cin >> n >> m;
	for (int i = 1; i <= n; ++i)
		cin >> a[i].fi >> a[i].se;
	for (int i = 1; i <= m; ++i)
		cin >> c[i];
		
	if (n <= 1e3 && m <= 1e3) sub2::sol();
	return 0;
}

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