#include <iostream>

using namespace std;
const int N = 1010;
int q[N];
int n,res;

int main(){
    cin >> n;
    for(int i = 0;i < n;i++){
        cin >> q[i];
    }
    int j = 0;
    for(int i = 0;i < n;i++){
        while(q[i] == q[j] && j < n) j++;
        if(j < n && q[i] != q[j]) res++,i = j - 1;
    }
    if(j >= n) res++;
    cout << res << endl;
    return 0;
}