package com.company;

import java.util.Scanner;

public class SoftUni {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        //String grade;
        int sum = 0;
        boolean isStop = true;
        int cakesNumber = Integer.parseInt(scanner.nextLine());
        for (int i = 0; i < cakesNumber; i++) {
            String chef = scanner.nextLine();
            do {
                String grade = scanner.nextLine();
            }
            while (!grade.equals("Stop")) ;

        }
        System.out.println(sum);
    }
}