This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include<bits/stdc++.h>
using namespace std;
#define ll long long
#define pb push_back
#define ff first
#define ss second
#define all(s) s.begin(),s.end()
#define rall(s) s.rbegin(),s.rend()
int main(){
ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0);
ll n,k;
cin>>n>>k;
ll d[n];
vector<ll>adj[n];
bool ok=false;
for(ll i=0;i<n;i++){
cin>>d[i];
if(d[i]>0) ok=true;
adj[i].pb(d[i]);
for(ll j=0;j<d[i];j++){
cin>>adj[i][j];
}
}
cout<<(ok?2:1);
}
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