#include <iostream>
#include <stdio.h>
using namespace std;
int main() {
int n, cnt=1;
string s, tmp;
scanf("%d", &n);
for(int i=0; i<n; i++) {
cin>>s;
if(i==0) {tmp=s; continue;}
else {if(s!=tmp) cnt++;}
tmp=s;
}
printf("%d", cnt);
return 0;
}
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