#include<fstream>
using namespace std;
ifstream fin("transport.in");
ofstream fout("transport.out");
int n,i,j,k,ok,x,s,h;
int main(){
    fin>>n>>k;
    for(i=1;i<=n;i++){
        fin>>x;
        s+=x;
    }
    h=s/k+s%k;
    fout<<h;
    return 0;
}