#include<iostream> #include<cmath> using namespace std; int main(){ long long n,a[1145],minn; cin>>n; for(int i=0;i<n;i++){ cin>>a[i]; }minn=abs(a[1]-a[0]); for(int i=0;i<n;i++){ for(int j=i+1;j<n;j++){ minn=min(minn,abs(a[i]-a[j])); } }cout<<minn; return 0; }