#include <math.h>
#include <stdio.h>
#define N 101
int a[N], n, ans;

int main() {
    scanf("%d", &n);
    for (int i = 1; i <= n; i++) {
        scanf("%d", &a[i]);
    }
    //	<i, i+1>   <1, n>
    for (int i = 1; i < n; i++) {
        if (a[i] != a[i + 1]) ans++;
    }
    if (a[1] != a[n]) ans++;
    printf("%d", ans);
    return 0;
}