import java.util.*;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int prev = 0;
        long count = 0;
        boolean isZunda = false;
        for (int i = 0; i < n; i++) {
            int x = sc.nextInt();
            if (isZunda) {
                if (x == prev) {
                    count++;
                } else {
                    isZunda = false;
                }
            } else {
                count++;
                isZunda = true;
            }
            prev = x;
        }
        System.out.println(count);
    }
}