更新了许多

小码君的好同学.cpp

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+#include <algorithm>
+#include <iostream>
+#include <iomanip>
+#include <cstring>
+#include <cstdio>
+#include <stack>
+#include <ctime>
+#include <cmath>
+#include <queue>
+typedef long long l;
+typedef double d;
+typedef char c;
+using namespace std;
+int vis[10000005];
+int main(){
+	int n,m;
+	cin >>n>>m;
+	queue<int> que;
+	for(int i=1;i<=m;i++){
+		int p,k;
+		cin >>p>>k;
+		if(vis[p]==0){
+			que.push(p);
+			vis[p]=1;
+		}
+		for(int j=1;j<=k;j++){
+			int t;
+			cin >>t;
+			if(vis[t]==0){
+				que.push(t);
+				vis[t]=1;
+			}
+		}
+	}
+	while(que.empty()==0){
+		cout <<que.front()<<" ";
+		que.pop();
+	}
+	return 0;
+}