#include<iostream>
#include<cstdio>
using namespace std;
int main(){
    freopen("grupuri.in","r",stdin);
    freopen("grupuri.out","w",stdout);
    int g, a,an[100001],i,sum,ct,b;
    cin>>g>>a;
    for(i=1;i<=a;i++)
        cin>>an[i];
    sum=0;
    ct=1;
    if(g==a)
        cout<<an[1];
    else{
        i=a;
        b=an[i];
        while(ct!=0)
            if(an[i]<=b)
                ct=0;
            else{
                an[i]=g;
                i--;
                }
        for(i=1;i<=a;i++)
            sum=sum+an[i];
        sum=sum/g;
        cout<<sum;
    }
    return 0;
}