Codeforces_344A

//Codeforces Round 344A
#include <iostream>
using namespace std;
int main()
{
    int n, nn[100001], answ=1;
    cin >> n;
    for(int i=0;i<n;i++)
    {
        cin >> nn[i];
        if(i!=0)
        {
            if(nn[i]!=nn[i-1])
            {
                answ++;
            }
        }
    }
    cout << answ;
    return 0;
}