#include <fstream>
using namespace std;
ifstream in("transport.in");
ofstream out("transport.out");
int n,k,nr,s;
int main()
{
    in>>n>>k;
    for(int i=1;i<=n;i++)
    {
        in>>nr;
        s+=nr;
    }
    int st=1;
    int dr=16000;
    while(st<=dr)
    {
        int mij=(st+dr)/2;
        if(mij*k<s)
            st=mij+1;
        else
            dr=mij-1;
    }
    out<<st;
    return 0;
}