#include <iostream>
using namespace std;
int main() {
// your code goes here
int count=1,n;
int x,y;
cin>>n;
cin>>x;
n-=1;
while(n--)
{
cin>>y;
if(x==y){
continue;
}
else
{
x=y;
count++;
}
}
cout<<count;
return 0;
}
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