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