제출 #1144701

#제출 시각아이디문제언어결과실행 시간메모리
1144701NomioAdvertisement 2 (JOI23_ho_t2)C++20
10 / 100
367 ms101792 KiB
#include<bits/stdc++.h>
using namespace std;
using ll = long long;
int main() {
	ios::sync_with_stdio(0);
	cin.tie(0);
	int n;
	cin >> n;
	ll x[n], e[n];
	set<int> chi[n], par[n];
	int cnt[n] {};
	for(int i = 0; i < n; i++) {
		cin >> x[i] >> e[i];
	}
	set<pair<int, int> > s;
	set<int> S;
	for(int i = 0; i < n; i++) {
		s.insert({x[i], e[i]});
		S.insert(i);
	}
	cout << s.size() << '\n';
	return 0;
}
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