#include <stdio.h>
#include <bits/stdc++.h>
#include <atcoder/all>
using namespace atcoder;
using mint = modint998244353;
using namespace std;
#define rep(i,n) for (int i = 0; i < (n); ++i)
#define Inf 1000000001

int main(){
	
	int N,M;
	cin>>N>>M;
	
	mcf_graph<long long,long long> G(N+M*8);
	
	rep(_,M){
		int k;
		cin>>k;
		
		long long c;
		cin>>c;
		
		vector<int> s(k);
		rep(i,k)cin>>s[i];
		
		rep(i,k){
			G.add_edge(s[i]-1,N+8*_+(s[i]%2)*2,1,s[i]/2);
			G.add_edge(s[i]-1,N+8*_+(s[i]%2)*2+1,1,s[i]/2);
			G.add_edge(N+8*_+4+(s[i]%2),s[i]-1,1,s[i]/2);
			G.add_edge(N+8*_+4+(s[i]%2)+2,s[i]-1,1,s[i]/2);			
		}
		
		G.add_edge(N+8*_+0,N+8*_+4+0,1,c);
		G.add_edge(N+8*_+1,N+8*_+4+1,1,c+1);
		G.add_edge(N+8*_+2,N+8*_+4+2,1,c+1);
		G.add_edge(N+8*_+3,N+8*_+4+3,1,c+1);
		
	}
	
	auto ans = G.flow(0,N-1,1);
	if(ans.first==0)cout<<-1<<endl;
	else cout<<ans.second<<endl;
	
    return 0;
}