#include<bits/stdc++.h>
using namespace std;
#define _ ios_base::sync_with_stdio(0);cin.tie(0);
#define lli long long int
int n;
lli minDiff,local;
int main(){ _
	cin>>n; 
	lli a[n];
	for(int i=0;i<n;i++){
		cin>>a[i];
	}
	sort(a,a+n);
	minDiff=INT_MAX;
	for(int i=0;i<n-1;i++){
		local=abs(a[i]-a[i+1]);
		if(local<minDiff){
			minDiff=local;
		}
	}
	cout<<minDiff;	
	return 0;
}