#include<bits/stdc++.h>
using namespace std;
#define ll long long int
ll a[100005];
int main()
{
    ios::sync_with_stdio(0);
    cin.tie(0);
    ll i,j,k,n;
    cin>>n;
    for(i=1;i<=n;i++)
    {
        cin>>a[i];
    }
    sort(a+1,a+n+1);
    ll ans=1e10;
    for(i=1;i<n;i++)
    {
        ans=min(ans,a[i+1]-a[i]);
    }
    cout<<ans;
    return 0;
}