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#include <iostream>
#include <stack>
using namespace std;
int main() {
  int n;
  cin>>n;
  int tab[n];
  stack < int > stosik;
  for (int i = 0; i < n; i++){
    cin>>tab[i];
  }
  for (int i = 0; i < n; i++){
    if (stosik.empty()){
      stosik.push(tab[i]);
    }
    else { if(stosik.top() == tab[i]){
        stosik.push(tab[i]);
    }
    else { 
      stosik.pop();
    
    }
         }
  }
if (!stosik.empty()){
  cout<<2;
}
   
}