#include <bits/stdc++.h>
using namespace std;
vector <char> memory;
int main()
{
int years = 18;
cout << years << endl;
return 0;
}
#include <bits/stdc++.h>
using namespace std;
vector <char> memory;
int main()
{
int years = 18;
cout << years << endl;
return 0;
}