#include <bits/stdc++.h>
using namespace std;
int main() {
int t;cin>>t;
while(t--){
int n;cin>>n;
int a[n];
int c=n;
for(int i=0;i<n;i++){
cin>>a[i];
if(i!=0)
{
if(a[i-1]==a[i])
c-=1;
}
}
cout<<c<<endl;
}
return 0;
}
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