Submission #533593

#	Time	Username	Problem	Language	Result	Execution time	Memory
533593		alvingogo	Exhibition (JOI19_ho_t2)	C++14	0 / 100	1 ms	204 KiB

joi2019_ho_t2

#include <bits/stdc++.h>
#pragma GCC optimize("Ofast")
#define AquA cin.tie(0);ios_base::sync_with_stdio(0);
#define fs first
#define sc second
#define cd complex<double>
#define p_q priority_queue
using namespace std;


int main(){
	AquA;
	int n,m;
	cin >> n >> m;
	vector<pair<int,int> > v(n);
	vector<int> p(m);
	for(int i=0;i<n;i++){
		cin >> v[i].fs >> v[i].sc;
	}
	sort(v.begin(),v.end());
	for(int i=0;i<m;i++){
		cin >> p[i];
	}
	sort(p.begin(),p.end());
	int nw=0;
	vector<pair<int,int> > z;
	for(int i=0;i<n;i++){
		while(nw<m && p[nw]<v[i].fs){
			nw++;
		}
		if(nw==m){
			break;
		}
		//cout << nw << " " << p[nw] << endl;
		auto h=upper_bound(z.begin(),z.end(),pair<int,int>(v[i].sc,-1))-z.begin();
		int a=h==0?0:max(z[h-1].sc+1,nw);
		//cout << a << endl;
		if(a>=m){
			continue;
		}
		if(h==z.size()){
			z.push_back({v[i].sc,a});
		}
		else{
			z[h].fs=v[i].sc;
			z[h].sc=a;
		}
		//cout << v[i].sc << endl;
		//nw++;
	}
	cout << z.size() << "\n";
	return 0;
}

Compilation message (stderr)

joi2019_ho_t2.cpp: In function 'int main()':
joi2019_ho_t2.cpp:41:7: warning: comparison of integer expressions of different signedness: 'long int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   41 |   if(h==z.size()){
      |      ~^~~~~~~~~~

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