# include<iostream> # include<cmath> # include<limits.h> using namespace std; int main(){ long long n,a[1001],x=LLONG_MAX; cin>>n; for(int i=0;i<n;i++){ cin>>a[i]; } for(int i=0;i<n-1;i++){ for(int j=i+1;j<n;j++){ x=min(x,abs(a[i]-a[j])); } } cout<<x<<endl; return 0; }