제출 #251487

#	제출 시각UTC-0	아이디	문제	언어	결과	실행 시간	메모리
251487	2020-07-21 12:36:22	imeimi2000	조이터에서 친구를 만드는건 재밌어 (JOI20_joitter2)	C++17	100 / 100	775 ms	49272 KiB

joitter2

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#include <bits/stdc++.h>
using namespace std;
typedef pair<int, int> pii;
int n;
int G[100001];
vector<int> L[100001];
set<pii> in[100001], out[100001];
int size(int x) {
    return L[x].size() + in[x].size() + out[x].size();
}
bool exist(const set<pii> &sp, int g) {
    auto it = sp.lower_bound(pii(g, 0));
    return it != sp.end() && it->first == g;
}
int main() {
    ios_base::sync_with_stdio(0); cin.tie(0);
    int m;
    cin >> n >> m;
    for (int i = 1; i <= n; ++i) G[i] = i, L[i].push_back(i);
    long long cnt = 0;
    while (m--) {
        int a, b;
        cin >> a >> b;
        if (G[a] == G[b] || in[G[b]].count(pii(G[a], a))) {
            printf("%lld\n", cnt);
            continue;
 
 
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• Subtask 2: 16 / 16
• Subtask 3: 83 / 83