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