Submission #788763

#	Time	Username	Problem	Language	Result	Execution time	Memory
788763		acatmeowmeow	Exhibition (JOI19_ho_t2)	C++11	100 / 100	48 ms	6356 KiB

joi2019_ho_t2

#include <bits/stdc++.h>

using namespace std;

#define int long long 

const int N = 1e5;
int n, m, S[N + 5], V[N + 5], C[N + 5], arr[N + 5];

signed main() {
	ios::sync_with_stdio(false);
	cin.tie(nullptr);
	cin >> n >> m;
	for (int i = 1; i <= n; i++) cin >> S[i] >> V[i];
	for (int i = 1; i <= m; i++) cin >> C[i];

	for (int i = 1; i <= n; i++) arr[i] = i;	
	sort(arr + 1, arr + n + 1, [&](int a, int b) { 
			if (V[a] == V[b]) return S[a] < S[b];
			else return V[a] < V[b];
	});

	sort(C + 1, C + m + 1);
	
	int ans = 0, index = n;
	for (int i = m; i >= 1; i--) {
		while (index && S[arr[index]] > C[i]) index--;
		if (!index) break;
		if (S[arr[index]] <= C[i]) index--, ans++;
	}
	cout << ans << '\n';
	return 0;
}

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