#define _CRT_DISABLE_PERFCRIT_LOCKS
#include<bits/stdc++.h>

#define ll long long int
#define pb push_back
#define ifor for(i=0; i<n; i++)

using namespace std;

ll INF=1e18;

int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(NULL); cout.tie(NULL);

    ll n, i, j, x, y, mindis=INF, kol;
    cin>>n;
    vector < ll > a(n);
    ifor
    {
        cin>>a[i];
    }
    sort(a.begin(), a.end());
    ll dis;
    mindis=abs(a[1]-a[1-1]);
    kol=1;
    for(i=2; i<n; i++)
    {
        dis=abs(a[i]-a[i-1]);
        if(dis==mindis) {kol++; }
        if(dis<mindis) {mindis=dis; kol=1;}
    }
    cout<<mindis<<" "<<kol<<endl;
    return 0;
}