#include <stdio.h>
using namespace std;

int v[100001];
int n, K, i, j;
int grup, S;

int main ()
{
    FILE *f = fopen ("grupuri.in","r");
    FILE *g = fopen ("grupuri.out","w");
    fscanf (f,"%d %d", &K, &n);

    for (i=1; i<=n; ++i)
    {
        fscanf (f,"%d", &v[i]);
        S += v[i];
    }

    grup = 1;
    while (K * grup <= S)
        grup ++;
    grup --;

    fprintf (g,"%d", grup);

    fclose(g);
    fclose(f);
    return 0;
}