import java.io.*;
import java.util.*;
public class measurement {

	public static void main(String[] args) throws IOException {
		Scanner sc = new Scanner(new File("measurement.in"));
		//Scanner sc = new Scanner(System.in);
		PrintWriter pw = new PrintWriter(new FileWriter("measurement.out"));
		int n = sc.nextInt();
		int changes = 0;
		String dis = "";
		sc.nextLine();
		String[] log = new String[n];
		TreeMap<String,Integer> off = new TreeMap<String,Integer>();
		off.put("Bessie", 7);
		off.put("Elsie", 7);
		off.put("Mildred", 7);

		for(int x = 0; x<n; x++){
			log[x] = sc.nextLine();
		}
		//System.out.println(Arrays.toString(log));
		Arrays.sort(log);

		int count = 0;
		for(int day = 1; day<=100; day++){
			if(count < n && String.valueOf(day).equals(log[count].substring(0, log[count].indexOf(" ")))){
				String[] data = log[count].split(" ");
				String cow = data[1];
				int value = 0;
				if(data[2].charAt(0) == '+')
					value = Integer.parseInt(data[2].substring(1));
				else
					value = Integer.parseInt(data[2]);
				//System.out.println(value);
				off.put(cow, off.get(cow)+value);
				count++;
			}
			//System.out.println(off);
			String disp = displayed(off);
			if(!disp.equals(dis)){
				System.out.println(disp);
				changes++;
			}
			dis = disp;
		}

		//pw.println(changes);
		pw.println(changes);
		pw.close();
		sc.close();

	}
	public static String displayed(TreeMap<String,Integer> off){
		String dis = "";
		int max = -100;
		for(String s : off.keySet()){
			max = Math.max(off.get(s), max);
		}
		for(String s : off.keySet()){
			if(off.get(s) == max)
				dis+=s;
		}
		return dis;
	}

}