제출 #742994

#제출 시각아이디문제언어결과실행 시간메모리
742994vjudge1Lightning Rod (NOI18_lightningrod)C++17
0 / 100
2053 ms249856 KiB
#include<bits/stdc++.h>

using namespace std;

int n,mx = -1,mn = 1e9+7,cnt;
vector<pair<int, int>> vc;
map<int, int> mp;

int main()
{
    ios_base::sync_with_stdio(0),cin.tie(0);
    cin>>n;
    for(int i = 0; i<n; ++i){
        int x,y;cin>>x>>y;
        mp[x]++;
        mx = max(mx,x);
        mn = min(mn,x);
    }
    cout<<mp.size();
}
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