import java.io.BufferedReader;
import java.io.InputStreamReader;

public class Main {
	public static void main(String[] args) throws Exception {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		int n = Integer.parseInt(br.readLine());
		String[] sa = br.readLine().split(" ");
		int[] a = new int[n];
		for (int i = 0; i < n; i++) {
			a[i] = Integer.parseInt(sa[i]);
		}
		br.close();

		int ans = 1;
		boolean flg = true;
		for (int i = 1; i < n; i++) {
			if (flg) {
				if (a[i] == a[i - 1]) {
					ans++;
				} else {
					flg = false;
				}
			} else {
				ans++;
				flg = true;
			}
		}
		System.out.println(ans);
	}
}