#include <iostream>
using namespace std;
int main() {
int n,x=0;
cin>>n;
int mass[n];
for(int i=0;i<n;i++)
{
cin>>mass[i];
}
for(int i=0; i<n; i++)
{
if(mass[i]!=mass[i+1])
{
i++;
x++;
}
}
return 0;
}
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