Submission #657581

#	Time	Username	Problem	Language	Result	Execution time	Memory
657581		TimDee	Inside information (BOI21_servers)	C++17	0 / 100	231 ms	524288 KiB

servers

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

bitset<120000> a[120002];

void solve() {

	int n,q; cin>>n>>q;
	forn(i,n) a[i].set(i);

	vector<string> a(n);
	vector<int> last(n);
	forn(i,n) last[i]=i;
	forn(i,n) a[i]+=i;

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

			int u,v; cin>>u>>v; --u,--v;
			if (u!=last[u]) a[u]=a[last[u]];
			if (v!=last[v]) a[v]=a[last[v]];
			if (a[u].size()<a[v].size()) swap(u,v);
			for (auto x:a[v]) a[u]+=x;
			a[v]=a[u];
			//last[u]=last[v]=u;
			//for (auto x:a[u]) cout<<x<<' '; cout<<"  ";
			//for (auto x:a[v]) cout<<x<<' '; cout<<'\n';

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

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

		} else {
			int x; cin>>x; --x;
			cout<<0<<'\n';
		}
	}

}

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

Compilation message (stderr)

servers.cpp: In function 'void solve()':
servers.cpp:36:26: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   36 |    cout << ((a[u].find(x)<n)?"yes\n":"no\n");
      |              ~~~~~~~~~~~~^~

• Subtask 1: 0 / 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