# include<iostream> # include<cmath> # include<limits.h> using namespace std; int main(){ long long n,a[1001],x=LLONG_MAX,y=LLONG_MAX,z=LLONG_MAX; cin>>n; for(int i=0;i<n-1;i++){ cin>>a[i]; } for(int i=0;i<n-1;i++){ for(int j=i+1;j<=n;j++){ if(x>abs(a[i]-a[j])){ x=abs(a[i]-a[j]); if(y>i&&z>j){ y=i; z=j; } } } } cout<<y+1<<" "<<z+1<<endl; return 0; }