#include <iostream>

using namespace std;

int main()
{
    int a[101];
    int k;
    cin>>k;
    for (int i=0; i<k; i++)
    {
        cin>>a[i];
    }
    for (int i=0; i<k; i++)
    {
        int q=i;
        int min=a[i];
        for (int j=i+1; j<k; j++ )
            if (a[j]<a[i])
            {
                q=j;
                min=a[j];
            }
        if (q!=i)
        {
            int tmp=a[i];
            a[i]=a[q];
            a[q]=tmp;
        }
    }
    long long s=0;
    for (int i=0; i<=(k/2); i++)
        s=s+((a[i]/2)+1);
    cout<<s<<endl;
    return 0;
}

Excuse me please, but I've already got AC. So I don't need your answers.

good for you