BCBEADS - Đếm hạt

/*
    Darkness
*/
#include <iostream>
using namespace std;

int main ()
{
    // In;
    int N;
    cin>>N;
    int Arr[N+1];
    for (int i=1; i<=N; i++)
    {
        cin>>Arr[i];
    }
    // Out
    int count=0;
    for (int i=1; i<N; i++)
    {
        if (Arr[i]!=Arr[i+1])
        {
            count++;
        }
    }
    cout<<count;

    return 0;
}