#include <fstream>

using namespace std;

int main()
{
    ifstream cin ("transport.in");
    ofstream cout ("transport.out")
    int a, b, c=0, d=1, n;
    cin>>a>>b;
    for(int i=0;i<a;i++)
    {
        cin>>n;
        c+=n;
    }
    while(d*b<c)
    {
        d++;
    }
    if(d*b==c)
        d++;
    d++;
    cout<<d;
    return 0;
}