Submission #990452

#	Time	Username	Problem	Language	Result	Execution time	Memory
990452		IWTIM	Exhibition (JOI19_ho_t2)	C++17	100 / 100	114 ms	5972 KiB

joi2019_ho_t2

#include<bits/stdc++.h>
using namespace std;
const int N=3e5+5;
int cur, x, n, c[N],m;
pair <int, int> a[N];
int check(int mid) {
	cur = 1;
	for (int i=m-mid+1; i <= m; i++) {
		x = 0;
		while (cur <= n) {
			if (a[cur].second<=c[i]) {
				x=1;
				cur++;
				break;
			}
			else cur++;
		}	
		if (x==0){
			return 0;
		}
	}

	return 1;

}
int main(){
	cin>>n>>m;

	for (int i=1; i<=n; i++){
		cin>>a[i].second; // zoma 
		cin>>a[i].first; // value
	}
	sort (a+1, a+n+1);

	for (int i=1; i<=m; i++){
		cin>>c[i];

	}
	sort (c+1, c+m+1);

	int l=1; 
	int r=min(n,m);
	int ans = 0;
	while (l<=r) {
		int mid=(l+r)/2;

		if (check(mid)) {
			ans=mid;
			l=mid+1;
		} else {
			r=mid-1;
		}
		
	}
	cout<<ans<<endl;
} 

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