#include<stdio.h>
int main()
{
	int num,i;
	char peo[50];
	char a = { ' ' };
    scanf("%d", &num);
    if (num == 0)
	{
		printf("1");
        return 0;
	}
	for (i = 0; i < num; i++)
	{
		scanf("%c", &a);
		scanf("%c", &peo[i]);
	}
	peo[i] = '\0';
	int count = 2;
	for (i = 0; i < num - 1; i++)
	{
		if (peo[i] != peo[i + 1])
		{
			count++;
		}
	}
	printf("%d", count);
	return 0;
}