# include<iostream> # include<cmath> using namespace std; int main(){ long long a[1001],n,i,j,s=0; int min,mina=1,minb=2; cin>>n; for(int i=1;i<=n;i++){ cin>>a[i]; }min=abs(a[1]-a[2]); for(i=1;i<=n;i++){ for(int j=i+1;j<=n;j++){ s=abs(a[i]-a[j]); if(s<min){ min=s; mina=i,minb=j; } } } cout<<mina<<" "<<minb<<endl; return 0; }