Submission #992125


Source Code Expand

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

typedef long long LL;
typedef pair<LL,LL> PII;

const int MAXN = 300000;
vector<int> graph[MAXN];

int main() {
	
	int N,M;
	cin >> N >> M;
	for(int i=0; i<N; i++) {
		int K;
		cin >> K;
		for(int j=0; j<K; j++) {
			int p;
			cin >> p;
			p--;
			graph[i].push_back(N+p);
			graph[N+p].push_back(i);
		}
	}
	
	vector<int> used(N+M, 0);
	used[0] = 1;
	queue<int> qu;
	qu.push(0);
	while(!qu.empty()) {
		int cur = qu.front(); qu.pop();
		
		for(int i=0; i<graph[cur].size(); i++) {
			int next = graph[cur][i];
			if(used[next]) continue;
			used[next] = true;
			qu.push(next);
		}
		
	}
	bool ok = true;
	for(int i=0; i<N; i++) {
		if(!used[i]) ok = false;
	}	
	if(ok) cout << "YES" << endl;
	else cout << "NO" << endl;
	
	return 0;
}

Submission Info

Submission Time
Task C - Interpretation
User tokoharu
Language C++14 (GCC 5.4.1)
Score 400
Code Size 835 Byte
Status AC
Exec Time 71 ms
Memory 12024 KB

Judge Result

Set Name sample dataset1 dataset2
Score / Max Score 0 / 0 200 / 200 200 / 200
Status
AC × 2
AC × 12
AC × 25
Set Name Test Cases
sample sample-01.txt, sample-02.txt
dataset1 sample-01.txt, sample-02.txt, 01-01.txt, 01-02.txt, 01-03.txt, 01-04.txt, 01-05.txt, 01-06.txt, 01-07.txt, 01-08.txt, 01-09.txt, 01-10.txt
dataset2 sample-01.txt, sample-02.txt, 01-01.txt, 01-02.txt, 01-03.txt, 01-04.txt, 01-05.txt, 01-06.txt, 01-07.txt, 01-08.txt, 01-09.txt, 01-10.txt, 02-01.txt, 02-02.txt, 02-03.txt, 02-04.txt, 02-05.txt, 02-06.txt, 02-07.txt, 02-08.txt, 02-09.txt, 02-10.txt, 02-11.txt, 02-12.txt, 02-13.txt
Case Name Status Exec Time Memory
01-01.txt AC 10 ms 7296 KB
01-02.txt AC 10 ms 7296 KB
01-03.txt AC 10 ms 7296 KB
01-04.txt AC 10 ms 7296 KB
01-05.txt AC 10 ms 7296 KB
01-06.txt AC 10 ms 7296 KB
01-07.txt AC 10 ms 7296 KB
01-08.txt AC 10 ms 7296 KB
01-09.txt AC 10 ms 7296 KB
01-10.txt AC 10 ms 7296 KB
02-01.txt AC 56 ms 10496 KB
02-02.txt AC 59 ms 11520 KB
02-03.txt AC 55 ms 9728 KB
02-04.txt AC 68 ms 11008 KB
02-05.txt AC 66 ms 11008 KB
02-06.txt AC 71 ms 11008 KB
02-07.txt AC 65 ms 11264 KB
02-08.txt AC 50 ms 11384 KB
02-09.txt AC 66 ms 12024 KB
02-10.txt AC 55 ms 11512 KB
02-11.txt AC 55 ms 11512 KB
02-12.txt AC 55 ms 11136 KB
02-13.txt AC 55 ms 11136 KB
sample-01.txt AC 10 ms 7296 KB
sample-02.txt AC 10 ms 7296 KB