#include <bits/stdc++.h>
using namespace std;
using i64 = long long;

int main() {
	i64 N;
	cin >> N;
	vector<i64> A(N);
	for(int i = 0;i < N;i++) cin >> A[i];
	
	i64 ans = 1;
	i64 before = 1;
	for(int i = 1;i < N;i++) {
		if(A[i] == A[i - 1]) {
			ans++;
			before = 1;
		}
		else if(before == 1) {
			before = 0;
		}
		else {
			ans++;
			before = 1;
		}
	}
	cout << ans << endl;
}