#include <iostream>
#include <cmath>
#include <vector>
#include <utility>
#include <queue>
#include <map>
#include <string>
#include <cstring>
#include <list>
#include <algorithm>
#define INF 114514
using namespace std;

typedef pair<double,double> P;
typedef long long ll;

int main(void){
	cout << 4 << endl;

	return 0;
}