# include<iostream> # include<cmath> using namespace std; int n; int a[1002]; int Min=1000000000,I=1000000000,J=1000000000; int main(){ cin>>n; for(int i=1;i<=n;i++) cin>>a[i]; for(int i=1;i<=n;i++){ for(int j=i+1;j<=n;j++){ if(a[j]-a[i]<=Min){ Min=a[j]-a[i]; I=i; J=j; } } } } cout<<I<<' '<<J; return 0; }