#include <iostream>
#include <fstream>
#include <algorithm>
using namespace std;
int n,k,a[100000],i,suma,maxim;
int main(){
    ifstream fin("grupuri.in");
    ofstream fout("grupuri.out");
    fin>>k>>n;
    for(i=0;i<n;i++){
        fin>>a[i];
        suma+=a[i];
    }
    maxim=suma/k;
    fout<<maxim;
    fin.close();
    fout.close();
    return 0;
}