#include <iostream>
#include <cstdio>
#include <cstring>
#include <vector>
#include <deque>
#include <queue>
#include <array>
#include <set>
#include <map>
#include <cmath>
#include <complex>
#include <algorithm>
#include <numeric>
#include <utility>
#include <tuple>
#include <functional>
#include <bitset>
#include <cstdint>
#include <cassert>
#include <random>

using namespace std;
using i64 = int64_t;
using i32 = int32_t;

int main() {
    int n;
    cin >> n;
    int c, p;
    bool f = false;
    int ans = n;
    for (int i = 0; i < n; ++i) {
        cin >> c;
        if (i > 0 && c != p && !f) {
            ans--;
            f = true;
        } else if (f) {
            f = false;
        }
        p = c;
    }
    cout << ans << endl;
    return 0;
}