import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.lang.*;

public class DSAP3 {

	static ArrayList<ArrayList<Integer>> data = new ArrayList<ArrayList<Integer>>();

	public static class Node {
		static int id;
		static int val;
		static ArrayList<Node> app = new ArrayList<Node>();

		private void add (Node mag) {
			app.add(mag);
		}

		private Node getChild (int pos) {
			return app.get(pos);
		}
	}

	public static void main(String[] args) {

		//read txt file
		BufferedReader br = null;
		
		try {

			int h = 0;

			//read in file
			String sCurrentLine;
			String file_path = args[0];

			br = new BufferedReader(new FileReader(file_path));
			h = Integer.parseInt(br.readLine());

			//read lines
			int i = 0;
		    ArrayList<Integer> apps = new ArrayList<Integer>();
			String str;
			String[] stra;

			while ((sCurrentLine = br.readLine()) != null) {
				str = sCurrentLine.replaceAll("\\D+"," ");
				str = str + " x";
				stra = str.split(" +");
				
				while (!(stra[i]).equals("x")) {
					apps.add(Integer.parseInt(stra[i]));
					i++;
				}
				data.add(apps);
				apps = new ArrayList<Integer>();
				i = 0;
			}
			

			Node head = addMag(0);
			System.out.println(head.val);
			// System.out.println(head.getChild(0).val);
			// System.out.println(head.getChild(1).val);
			// System.out.println(head.getChild(2).val);
			// System.out.println(head.getChild(1).getChild(1).val);

		} catch (IOException e) {
			e.printStackTrace();
		}
	}

	public static Node addMag(int x) {
		Node temp = new Node();
		temp.id = data.get(x).get(0);
		temp.val = data.get(x).get(1);
		// System.out.print(temp.id + " ");
		// System.out.println(temp.val + " ");
		for (int c = 2; c < data.get(x).size(); c++) {
			temp.add(addMag(data.get(x).get(c)-1));
		}
		// System.out.print(temp.id + " ");
		// System.out.println(temp.val + " ");
		// System.out.print("\n");
		return temp;
	}

}