Problem: This issue is a reactive issue. It is necessary to create a program that derives the correct answer by interactively responding to the program prepared on the server side.





Example

Input




Output

Solution (in CPP):

Solution:
#include <bits/stdc++.h>
using namespace std;
#define repl(i,a,b) for(int i=(int)(a);i<(int)(b);i++)
#define rep(i,n) repl(i,0,n)
#define mp(a,b) make_pair((a),(b))
#define pb(a) push_back((a))
#define all(x) (x).begin(),(x).end()
#define uniq(x) sort(all(x)),(x).erase(unique(all(x)),end(x))
#define fi first
#define se second
#define dbg(x) cout<<#x" = "<<((x))<<endl
template<class T,class U> ostream& operator<<(ostream& o, const pair<T,U> &p){o<<"("<<p.fi<<","<<p.se<<")";return o;}
template<class T> ostream& operator<<(ostream& o, const vector<T> &v){o<<"[";for(T t:v){o<<t<<",";}o<<"]";return o;}

#define INF 21474836

int main(){
  int n,m;
  cin>>n>>m;

  int ans=0;
  rep(i,n){
    int k;
    cout << "lst " << i << endl;
    cin>>k;
    ans += k * (k-1);
    rep(j,k){
      int d;
      cin>>d;
    }
  }

  cout << "ans " << ans << endl;

  return 0;
}