#include <bits/stdc++.h>
using namespace std;
#define f(i,k,n) for(int i=k; i<n; i++)
#define ll long long
const int inf = INT_MAX;

void solve()
{
    int n,x;
    cin>>n>>x;
    ll a=0,b=0;
    int q;
    f(i,0,n)
    {
        cin>>q;
        a+=q/x;
        b+=q%x;
    }
    if(a>b && (a-b)%(x+1)==0) cout<<a-(a-b)/(x+1);
    else if(a>b)    cout<<a-(a-b)/(x+1)-1;
    else   cout<<a<<"\n";
   /*while(b<a)
    {
        a--;
        b+=x;
    }
    cout<<a<<"\n";
    */
}

int main()
{
    ios::sync_with_stdio(0);
    cin.tie(0);
    int t=1;
    //cin>>t;
    while(t--)  solve();
    return 0;
}