记录编号	574103	评测结果	AAAAAAAAAAAAAAAAAAAA
题目名称	[CSP 2021S]廊桥分配	最终得分	100
用户昵称	yrtiop	是否通过	通过
代码语言	C++	运行时间	0.466 s
提交时间	2022-07-30 13:23:27	内存使用	4.41 MiB

#include <bits/stdc++.h>
#define mp make_pair
#define fir first
#define sec second
using namespace std;
const int maxn = 1e5 + 5;
typedef pair<int,int> pii;
struct node {
	int x,y;
	node() {
		x = y = 0;
	}
}a[maxn],b[maxn];
int n,m,k;
int sum1[maxn],sum2[maxn];
priority_queue<pii,vector<pii>,greater<pii> > q;
priority_queue<int,vector<int>,greater<int> > s;
int main() {
	freopen("2021airport.in","r",stdin);
	freopen("2021airport.out","w",stdout);
	scanf("%d %d %d",&n,&m,&k);
	for(int i = 1;i <= m;++ i) {
		scanf("%d %d",&a[i].x,&a[i].y);
	}
	sort(a + 1 , a + 1 + m , [&](const node& p,const node& q) {
		return p.x < q.x;
	});
	for(int i = 1;i <= k;++ i) {
		scanf("%d %d",&b[i].x,&b[i].y);
	}
	sort(b + 1 , b + 1 + k , [&](const node& p,const node& q) {
		return p.x < q.x;
	});
	while(!q.empty())q.pop();
	while(!s.empty())s.pop();
	for(int i = 1;i <= m;++ i)s.push(i);
	for(int i = 1;i <= m;++ i) {
		for(;!q.empty()&&q.top().fir < a[i].x;q.pop())s.push(q.top().sec);
		int ans = s.top();
		s.pop();
		++ sum1[ans];
		q.push(mp(a[i].y , ans));
	}
	while(!q.empty())q.pop();
	while(!s.empty())s.pop();
	for(int i = 1;i <= k;++ i)s.push(i);
	for(int i = 1;i <= k;++ i) {
		for(;!q.empty()&&q.top().fir < b[i].x;q.pop())s.push(q.top().sec);
		int ans = s.top();
		s.pop();
		++ sum2[ans];
		q.push(mp(b[i].y , ans));
	}
	for(int i = 1;i <= n;++ i)sum1[i] += sum1[i - 1],sum2[i] += sum2[i - 1];
	int ans = 0;
	for(int i = 0;i <= n;++ i)ans = max(ans , sum1[i] + sum2[n - i]);
	printf("%d\n",ans);
	return 0;
}