#include <fstream>

using namespace std;

ifstream fin("grupuri.in");
ofstream fout("grupuri.out");

int n, k, i, x, s;

int main()
{
    fin>>n>>k;
    for (i=1; i<=k; i++)
    {
        fin>>x;
        if (x>n)
            x=n;
        s+=x;
    }
    fout<<s/n;
    return 0;
}