Submission #657573

#	Time	Username	Problem	Language	Result	Execution time	Memory
657573		TimDee	Inside information (BOI21_servers)	C++17	2.50 / 100	2697 ms	524288 KiB

servers

#include <bits/stdc++.h>
using namespace std;
#define forn(i,n) for (int i=0; i<n; ++i)

void solve() {

	int n,q; cin>>n>>q;
	vector<set<int>> a(n+1);
	forn(i,n) a[i+1].insert(i+1);

	forn(Q,n-1+q) {
		char c;
		cin>>c;
		if (c=='S') {

			int u,v; cin>>u>>v;
			for (auto x:a[u]) a[v].insert(x);
			for (auto x:a[v]) a[u].insert(x);

		} else if (c=='Q') {

			int u,x; cin>>u>>x;
			cout << (a[u].count(x)?"yes\n":"no\n");

		} else {
			cout<<"0\n";
		}
	}

}

int32_t main() {
	ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
	solve();
	return 0;
}

• Subtask 1: 2.5 / 2.5
• Subtask 2: 0 / 2.5
• Subtask 3: 0 / 2.5
• Subtask 4: 0 / 2.5
• Subtask 5: 0 / 5
• Subtask 6: 0 / 5
• Subtask 7: 0 / 10
• Subtask 8: 0 / 10
• Subtask 9: 0 / 12.5
• Subtask 10: 0 / 12.5
• Subtask 11: 0 / 17.5
• Subtask 12: 0 / 17.5