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