#include<iostream> // cin\cout\endl #include<cstdio> //scanf()\printf() #include<cstring> // strcpy()\strcat()\strcmp()\strlen()\memset() #include<cmath> //sqrt()\pow()\abs()\ceil()\floor()\max()\min() using namespace std; int main(){ int n,a[1001]={ },min,x1,x2; cin>>n; for(int i=1;i<=n;i++)cin>>a[i]; min=abs(a[1]-a[2]); x1=1; x2=2; for(int i=1;i<=n;i++){ for(int j=i+1;j<=n;j++){ if(min>abs(a[i]-a[j])){ min=abs(a[i]-a[j]); x1=i; x2=j; } } } cout<<x1<<" "<<x2<<endl; return 0; }