제출 #922290

#제출 시각아이디문제언어결과실행 시간메모리
922290SuPythonyAdvertisement 2 (JOI23_ho_t2)C++17
10 / 100
448 ms29360 KiB
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;

int main() {
    int n; cin>>n;
    unordered_set<int> s;
    while (n--) {
        int x,e; cin>>x>>e;
        s.insert(x);
    }
    cout<<s.size();
    return 0;
}
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