제출 #1224390

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1224390		SpyrosAliv	Inside information (BOI21_servers)	C++20	0 / 100	581 ms	589824 KiB

servers

#include <bits/stdc++.h>
using namespace std;

const int MN = 120005;
const int MQ = 120005;
vector<set<int>> sets(MN);
int n, q;

void merge(int u, int v) {
    if (sets[u].size() < sets[v].size()) swap(u, v);
    for (auto x: sets[v]) {
        sets[u].insert(v);
    }
    sets[v] = sets[u];
}

int main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cin >> n >> q;
    for (int i = 1; i <= n; i++) {
        sets[i].insert(i);
    }
    for (int qq = 1; qq <= n + q - 1; qq++) {
        char s; cin >> s;
        assert(s != 'C');
        if (s == 'S') {
            int a, b; cin >> a >> b;
            merge(a, b);
        }
        else {
            int a, b; cin >> a >> b;
            if (sets[a].find(b) != sets[a].end()) cout << "yes\n";
            else cout << "no\n";
        }
    }
}

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