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>
#define rep(i,n) for(int i=0;i<(int)(n);i++)
#define rep1(i,n) for(int i=1;i<=(int)(n);i++)
#define all(c) c.begin(),c.end()
#define pb push_back
#define fs first
#define sc second
#define show(x) cout << #x << " = " << x << endl
#define chmin(x,y) x=min(x,y)
#define chmax(x,y) x=max(x,y)
using namespace std;
int main(){
	int N,M;
	cin>>N>>M;
	int ans=0;
	rep(i,N){
		cout<<"lst "<<i<<endl;
		int K,gomi;
		cin>>K;
		rep(i,K) cin>>gomi;
		ans+=K*(K-1);
	}
	cout<<"ans "<<ans<<endl;
}