제출 #721012

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
721012		pcc	Exhibition (JOI19_ho_t2)	C++14	100 / 100	594 ms	10248 KiB

joi2019_ho_t2

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

#define ll long long
#define int ll
#define pll pair<ll,ll>
#define fs first
#define sc second
const ll mxn = 1e5+10;
ll n,m;
pll arr[mxn];
ll brr[mxn];

bool f(ll k){
	multiset<ll> st;
	int p = 0;
	int pre = 0;
	for(int i = m-k;i<m;i++){
		while(p<n&&arr[p].fs<=brr[i]){
			st.insert(arr[p].sc);
			p++;
		}
		auto it = st.lower_bound(pre);
		if(it == st.end())return false;
		pre = *it;
		st.erase(st.find(*it));
	}
	return true;
}

main(){
	ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);
	cin>>n>>m;
	for(int i = 0;i<n;i++)cin>>arr[i].fs>>arr[i].sc;
	for(int i = 0;i<m;i++)cin>>brr[i];
	sort(arr,arr+n);
	sort(brr,brr+m);
	int l = 0,r = m;
	while(l != r){
		int mid = (l+r+1)>>1;
		if(f(mid))l = mid;
		else r = mid-1;
	}
	cout<<l;
}

컴파일 시 표준 에러 (stderr) 메시지

joi2019_ho_t2.cpp:31:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   31 | main(){
      | ^~~~

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