import java.util.ArrayList;
		// you can also use imports, for example:
		// import java.util.*;

		// you can write to stdout for debugging purposes, e.g.
		// System.out.println("this is a debug message");

		class Osoba
		{
		    public int Wiek;
		    public String Imie;

		    public Osoba(int wiek, String imie) {
		        this.Wiek = wiek;
		        this.Imie = imie;
		    }
		}

		class Solution {

		    public int solution(int X) {

		    	ArrayList<Osoba> peopleList = new ArrayList<Osoba>();

		    	for (int i = 0; i < X; i++) {
		    		int age = i*10>99 ? i*10%X : i*10;
		    		String name = "John " + ++i;
					peopleList.add(new Osoba(age, name));
				}

		    	return countAdults(peopleList);
		    }

		    public int countAdults(ArrayList<Osoba> peopleList) {
		    	int counter = 0;

		    	for (Osoba osoba : peopleList) {
					if (osoba.Wiek > 18)
						counter++;
				}
		    	return counter;
		    }