A. Valera and Antique Items1000 / 水题

Posted 2021-11-25 幽殇默

https://codeforces.com/problemset/problem/441/A

#include<bits/stdc++.h>
using namespace std;
int n,m;
vector<int>ans;
int main(void)
{
	cin>>n>>m;
	for(int i=0;i<n;i++)
	{
		int k; cin>>k;
		bool flag=0;
		for(int j=0;j<k;j++)
		{
			int x; cin>>x;
			if(x<m) flag=1;
		}
		if(flag) ans.push_back(i+1);
	}
	cout<<ans.size()<<endl;
	for(int i=0;i<ans.size();i++) cout<<ans[i]<<" ";
}