#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 (long long)2000000000

int main(){
	
	int N,K;
	cin>>N>>K;
	
	vector<int> A(N),M(N);
	vector<vector<int>> B(N);
	rep(i,N){
		cin>>A[i]>>M[i];
		B[i].resize(M[i]);
		rep(j,M[i]){
			cin>>B[i][j];
			B[i][j]--;
		}
	}
	
	mcf_graph<long long,long long> G(N);
	rep(i,N-1){
		G.add_edge(i,i+1,100,Inf);
	}
	
	rep(i,N){
		rep(j,B[i].size()){
			int x = B[i][j];
			int y = i;
			G.add_edge(x,y,1,Inf*(y-x) - (-A[x]+A[y]));
		}
	}
	
	long long ans = G.flow(0,N-1,K).second;
	rep(i,K){
		ans -= Inf*(N-1);
	}
	ans *= -1;
	
	cout<<ans<<endl;
	
	return 0;
}