#include<bits/stdc++.h>
#include<string>
using namespace std;
int main  ()
{

   int length ;
   int n=1;
   cin>>length;
   string arr[(length-1)];
for(int i=0 ;i<=length-1;++i){
    cin>>arr[i];
}
for(int i=0 ;i<=length-2;++i){
    if(arr[i]!=arr[i+1])
        ++n;
}

   cout<<n;
   return 0;
}