제출 #864469

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
864469		iskhakkutbilim	Railway (BOI17_railway)	C++17	0 / 100	42 ms	7620 KiB

railway

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

#define int long long
#define ff first
#define ss second
#define all(a) a.begin(), a.end()


int n, m, k;
vector< pair<int, int> > edge;

main(){
   ios::sync_with_stdio(0);
   cin.tie(0); cout.tie(0);
	cin >> n >> m >> k;
	for(int i = 1;i < n; i++){
		int a, b; cin >> a >> b;
		edge.push_back({a, b});
	}	
	map<int, int> mp;
	for(int i = 0;i < m; i++){
		int sz; cin  >> sz;
		if(sz % 2) assert(false);
		for(int j = 0;j < sz; j++){
			int idx; cin >> idx;
			mp[idx]++;
		}
	}
	vector<int> ans;
	for(auto [x, y] : mp){
		if(y >= k){
			ans.push_back(x);
		}
	}
	sort(all(ans));
	cout << ans.size() << '\n';
	for(int x : ans) cout << x << ' ';
	return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

railway.cpp:13:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   13 | main(){
      | ^~~~

• Subtask 1: 0 / 8
• Subtask 2: 0 / 15
• Subtask 3: 0 / 7
• Subtask 4: 0 / 29
• Subtask 5: 0 / 16
• Subtask 6: 0 / 25