BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
        ArrayList<Integer> list = new ArrayList();
        for(int i = 0;i < 10;i++){
            int a = Integer.parseInt(reader.readLine());
            list.add(a);
        }
        int x = 1;
        for(int i = 0;i < list.size()-1;i++){
            if(list.get(i) == list.get(i+1)){
                x++;
            }
        }
        System.out.println(x);