#include  <iostream>
#include  <iomanip>
#include  <cstdlib>
#include  <algorithm>
using namespace std;
int main()
{
	
    int n; cin>>n;
    int a[n];
    for (int i=0; i<n; i++)
    {
    	cin>>a[i];
    }
    
    cout<<n-n/2<<"\n";
	
	return 0;
}
