#include <bits/stdc++.h>
using namespace std;

using int64 = long long;
using i64 = int64;

#define rep(i,N) for(int i=0;i<(int)(N); ++i)

const int inf = 1 << 30;
const int64 inf64 = 1ll << 60;

int main() {
   int N; cin >> N;
   vector<int> A(N);
   rep(i, N) cin >> A[i];
   
   int ans = 0;
   bool prev = false;
   for(int i=0; i<N; ++i) {
      if(i == 0) {
         ans++;
         prev = true;
         continue;
      }
      if(A[i-1] == A[i]) {
         ans++;
         prev = true;
      }
      else {
         if(prev) prev = false;
         else {
            ans++;
            prev = true;
         }
      }
   }

   cout << ans << endl;
}